Missouri does not require ethanol labeling on gasoline dispensers. STIHL MotoMix® is a high-grade, high-octane, ethanol-free premixed fuel containing STIHL HP Ultra synthetic oil. BTW both my cars require premium and they run like absolute garbage with 87 octane. One of them is Brazil, where by law all fuels need to have at least 20% Ethanol. I bring a 55 gal drum out as needed ( every other week ) and top it off with the 91 non ethanol. If your vehicle requires 91 octane gas or higher, using gas with a lower octane level could void your car warranty and may eventually cause engine damage. So, please tell me the adv/disadv of 93-octane (10% ethanol) and 91-octane PURE gas. Most gas stations offer three octane grades: regular (usually 87 octane), mid-grade (usually 89 octane), and premium (usually 92 or 93). The Ethanol gas will have higher octane and result in smooth combustion in many of these engines. Gold 89 Octane is 2x base and Platinum 91 Octane is 3x base of Bonus Bucks Everyday Fuel Rewards schedule. E85 is an ethanol-based, clean-burning alternative to petroleum gasoline. Doo's manual states no more than 10% alcohol in the fuel. In my own experience I get the best mpg running 87 octane. The state must play with chemistry to keep down emissions. Google it you will understand it better than I can explain. As a result, a new market is growing in the U. Gulf Coast - Florida. The fuel you describe; 91 octane, no ethanol, should be an excellent fuel for the 1. E10 is made up of 90 per cent unleaded with a blend of 10 percent ethanol content. There is more misinformation in this thread than useful information. If you score 100 on the octane scale, your fuel burns the same as if it were 100% octane. However, you should have a proper tune for this. In north dakota they have only one type of fuel with ethanol and its usally the 89. •May post AKI if "competent and reliable". Octane, Ethanol and does anyone know?? I have a 2005 Elise with Katana SC, a 93 Caterham with a Jay Ivey crossflow, prepared to about 3/4 race, and an Elan, 1971. I filled up my car with E100 because of 2 reasons. In a worst-case scenario, using bad gas could even void the. With the advent of knock sensors and electronic timing advance/retard, the engine can handle a wide range of fuels, therefore octane rating usually translates into lower fuel mileage or hp for lower octane (due to retarding of the ignition to offset knocking/pinging). The 85-octane issue is unrelated to E-85, a reference to a motor fuel that contains a blend of gasoline and up to 85 percent ethanol. When I use name-brand gas e. Available in three octane levels, our Synergy gasoline has been engineered to help clean up intake valves and improve gas mileage and performance. For me its a 3-4mpg difference average. after resetting the code, it came back after another 50 miles. Most vehicles are designed to run on 87 octane, but others require a higher octane fuel. " Not sure what that meant. But it gets close to 50 MPG on ethanol-free (which is always 91-octane or higher in New York). When you put premium into the tank, the computer will run the high octane table giving you greater performance and usually better fuel economy. there is a reason many super high hp race gas blends contain oxygenates: it's because oxygen is always the dearest thing to making power in an IC engine. Would you switch to 91 octane, if your engine required a higher octane, reasons it might make parts last longer, ect. Esso 91 doesn't have ethanol in greater Toronto area. 91 octane will still have more resistance to knock than 88, but a 91 ethanol free will return better fuel economy and probably smoother burn than 91 with ethanol. I have a 2005 Nissan Murano and on that trip had a Thule cargo box on top. Even then, care should be taken to not over do it. I think I mentioned that in my post. I cannot find any 92 or 93 ethanol free fuel where we are in Florida - most have 90 - but a local station does have 110 octane (I have not checked the price). I didn't check to see what it said on the pumpvas far as ethanol content, I just read that it was high online. The chief benefit to the Smart car, is the. I run 93 octane in my Road King. I've been using 93 octane/ethanol and the car has been running great, but never know if it will take 1 or 5 attempts before starting. , unleaded gasoline typically has octane ratings of 87 (regular), 88-90 (midgrade), and 91-94 (premium). One of them is Brazil, where by law all fuels need to have at least 20% Ethanol. Although it has a higher octane, ethanol has less energy per volume than gasoline. I also realise that even though ethanol fuels has a higher Octane rating, the ethanol itself does not have the same energy content as normal fuel, therefore having a countereffect. Ethanol is a cleaner burning fuel than normal 91 Octane fuel too, resulting in less pollution of the atmosphere. I have found a few C/P 66 stations with PURE GAS, but it is 91-octane. You may notice changes in your gas mileage when you fill up your tank with an ethanol blend. The octane rating of gasoline is measured in a test engine, and is defined by comparison with the mixture of 2,2,4-trimethylpentane (iso-octane) and heptane which would have the same anti-knocking capacity as the fuel under test: the percentage, by volume, of 2,2,4-trimethylpentane in that mixture is the octane number of the fuel. aside, the octane level requirement in our TJ engines is 87, nothing higher is required or of any benefit whatsoever. Ironically ethanol is actually very high-octane and a large part of the reason to use it is as an octane booster. i also got a bottle of Liquid Performance fuel treatment from a local shop to clean the fuel system. These specifications vary seasonally and geographically, leading to differences in components within the fuels, whether or not a fuel is oxygenated,different ratios of ethanol in the fuels, and different octane ratings, each of which can require a different air/fuel ratio for tuning an engine. The truth of the matter is probably less extreme and includes a bit of each side--ethanol as a fuel does have some challenges, but it also has some benefits. I know the manual says that 91 octane is recommended but not required. GM vehicles have two octane tables. Any octane level above 91 octane will contain ethanol. I can buy 93 octane fuel here in Tennessee but it is 10% ethanol. Usually premium gas can contain more because ethanol is a cheap and effective octane booster. Some studies have shown that fuel economy may decrease slightly by one to four miles per gallon, but there are many variables that impact your mileage, including tire pressure, car condition, use of heater or air conditioner, etc. 12-16 ounces will only raise octane 2-3 *points*, I. automakers. 87 and 91 are the same fuel, just different compounds added to resist knock. 3 MPG while using it on a recent road trip. STIHL MotoMix® is a high-grade, high-octane, ethanol-free premixed fuel containing STIHL HP Ultra synthetic oil. I imagine you would see 10MPG lower, and a great reduction in drive-ability and acceleration. Regarding ethanol’s advantages, I’ve learned that blending ethanol with gasoline does not produce a linear scale of results. Always be sure to understand the fuel that is necessary and sustainable. Usually premium gas can contain more because ethanol is a cheap and effective octane booster. So yesterday I pull into the 66 to send a text and notice they have 91 octane with NO ETHANOL. Ethanol flex fuel (formerly known as E85) has between 51 and 83% ethanol with the remainder being gasoline. You will likely not see a performance increase in a John Deere X320 by using higher octane fuels, which typically. Will my car pass the smog check using higher octane gas? There may indeed be value to selecting higher octane. 238 this week at retail, according to the US Energy Information Administration. If it did it would have a higher octane rating. If the pump says no ethanol then you're good whether it is 93 no ethanol or 91 no ethanol neither have it. That got me thinking. STIHL MotoMix® is a high-grade, high-octane, ethanol-free premixed fuel containing STIHL HP Ultra synthetic oil. Around here, my gas is 93, when I have been places where the highest is 91, I observed no difference. I also realise that even though ethanol fuels has a higher Octane rating, the ethanol itself does not have the same energy content as normal fuel, therefore having a countereffect. As the octane rating goes up, so too does the gasoline's ability to withstand compression without spontaneously detonating or igniting. And just across the Potomac in Northern Virginia, the common premium is 93, and only 3 or 4 places sell 91. 10% seems to be a magic number because 10% also seems to be the amount of fuel trim a fuel injection car can compensate for w/o drivability issues, emission spikes CEL's etc. I have experienced knock on hills with the 91 octane, none with the 10% ethanol 93 octane. Beginning in the 1920s, tetraethyl lead was a common additive found in gasoline. its 91 all other fuel is 87 or 89 with up to 10%. E10 is 10%ethanol in gasoline, which is the US all fuel has 10% ethanol. I aim to run 91 octane regular gas but am not scared to fill up with 91 ethanol or 89 regular or ethanol if 91 regular is not available. Any experiences with Ethanol free lower octane of 89 or buy 91 octane with ethanol treated with Ethanol Fuel Treatment. The only way I can prevent this is with octane booster. I have seen the same warning in regard to the fuel possibly contatining up to 10% ethanol @ my local Shell station. Most boaters, however, don't know that using a gasoline or diesel fuel specially formulated for marine engines can significantly reduce fuel consumption and maintenance costs, extend marine engine life, and. Those numbers – 91, 95 and 98 – are the so-called ‘octane rating’ of the fuel. DO NOT use any flex-fuel or gasoline that could contain more than 10% ethanol, including from any pump labeled E15, E30, E50, E85 (which are only some examples of fuel containing more than 10% ethanol). The discontinuation of our premium 94 Octane fuel comes as a result of changes to regulations that restrict the Reid Vapour Pressure (RVP) of. Never saw a det light for the 3 years I owned the machine. Re: 87 octane with ethanol OR 91 octane ethanol free Have been repairing engines since the 60's and ethanol does not seen to create the problem in the older engines. Just confirmed with Esso fuel quality manager. ran on higher-octane gasoline, the automotive industry would produce 35 million fewer tons of carbon emissions per year, saving up to $6 billion in fuel costs. Many things can be added to the fuel to increase the octane rating. What About Mid-Grade? Some stations offer mid-grade fuel (usually 89 octane). I have tried a few times and in my experience higher octane fuel in a engine that doesn't require it will do nothing for you. It should be noted that premium fuel will always give you the best performance, and often has cleaning additive to help clean your engine. I always run 91 non-ethanol gas in my car as I have the 91 octane tune. 87 and 91 are the same fuel, just different compounds added to resist knock. It just varies from station to station, and it's up to the station owner whether or not to sell pure gas. 9:1 compression ration which is on the higher side. Finding ethanol and ethanol-free gasoline. The ethanol-blended e10 (a mixture of up to 10 per cent ethanol in petrol) is a substitute for 91 in most cars. However, EPA recently reported that it is undertaking a statutory analysis of the RVP waiver for inclusion of E15. Ethanol, used as an extender in much of our gasoline, is also an octane enhancer. )/91+ recommended". Chevron, Arco, Shell I get 32 mpg on a specific freeway strip. I thought what the hell and filled up on it. after resetting the code, it came back after another 50 miles. BP Ultimate also. It's just a combustion rating, nothing more. In the 1940s, the US Army built the first American fuel ethanol plant, which supplied fuel to the Army. Only High Compression Engines will benefit for high octane, which burns SLOWER than lower octane. That yields a final fuel rating of between 96 and 98 octane. Some cars that are compatible with 5 per cent ethanol are not necessarily also compatible with E10, so caution must be taken when referring to the car's fuel requirements. The owner's manual actually warns about not using premium. Run it all the time without pinging. You can find pumps that have 90 octane rec fuel and it will state it right on the pump. 87 vs 91 Octane Gas. Propane and diesel (where available) qualify for single Bonus Bucks. There are multiple fuel types available - a low-cost type that's marked with an 87 octane rating that also has 10% ethanol, a medium priced gas that's 87 but more expensive than the ethanol gas, and a premium fuel that has a 91 octane rating. The numbers you see on the gas pump, like 87 or 91, are octane ratings. It took a big power hit if I ran regular gas. It is a pure and stable fuel mixture that can be stored for up to two years in the original container and is ideal for machines that are used infrequently. 89 at those stations (and the Petro exception below) is 5% ethanol as the pumps blend 50% 87 + 50% 91. Octane 91 Our premium grade unleaded gasoline was formulated with a higher octane level and more cleaning agents to meet the demands of some of today's most advanced engines. 5L/100km on a trip. I know the manual says that 91 octane is recommended but not required. Therefore, Australia does not have any regular ethanol trade that it can reference for the determination of an IPP. I haven't had any fuel problems either, but my boat does sit for a while between uses. It will remain stable indefinitely in a sealed container and won’t degrade plastic, rubber or fiberglass components in your fuel system, allowing quick starts even after equipment sits idle for many months. Performance decreased substaintially. The fuel mileage was 40. Whether you fill up with Regular (87 octane), Plus (89 octane), Premium (91 octane) or Ultra (R) 93 grade of fuel, rest assured you're getting the very best at the pump. The dyno sheet for the 91-octane fuel showed horsepower and torque figures within one point of those measured on the 89-octane fuel. First of all, as long as you are using the right type of fuel (in this case, unleaded gasoline) there is no situation in which using fuel with a higher octane rating than that recommended will damage your engine. Ethanol is just like all the other stuff in gasoline, some of the compounds are low energy and high octance, some are high energy and high octane and they mix it all up and get an average octane rating. Personally, I have always avoided the low octane and opt for the mid (89) or premium (91. Each brand takes the white gas-which could have been made anyone's refinery-and adds their own special ingredients to then sell in their brand's gas stations. 6 MPG (based on your 18 earlier) is your break even MPG. However non ethanol with a booster might be just the ticket. Finding ethanol and ethanol-free gasoline. I now have 10 hours on my 2015 XMR 800. Persoannly, I think there will come a day when most stations will offer it has a third alternative to 87-89-91 octane. Along with the higher combustion temperatures, greater ethanol concentrations mean slightly less power density. This means a significant reduction in pre-ignition, or knocking and pinging. I was in waaaaaaay northern Canada for almost two weeks just recently and up there they advertise that gasoline does not have ethanol. 89 at those stations (and the Petro exception below) is 5% ethanol as the pumps blend 50% 87 + 50% 91. Ethanol as an Octane Booster. Performance decreased substaintially. Ethanol is hygroscopic. First, because it has a higher octane number than ethane and even many of the larger hydrocarbons, ethanol can be used to boost the octane of a fuel. 5:1 I believe) coupled with more aggressive timing than autos, so the 91 octane is required to run optimally. To get octane with petroleum you have to add things like methanols of other highly toxic fuels. Octane has NOTHING TO DO WITH THE QUALITY OF THE GASOLINE. Around here, my gas is 93, when I have been places where the highest is 91, I observed no difference. Cant believe I havent done this before. 7, So on 93 octane with 10 percent Ethanol, my AFR is 12. To simplify, we’ve used 87, 89 and 91 for regular, mid-grade and premium fuel. Look below for the octane levels available at your local Bucky's. Ethanol - Wikipedia, the free encyclopedia The reason performance cars use higher octane is to enhance when and how the fuel burns. Will Ethanol clog my fuel filter? By and large, this will not occur. I believe it is 88 octane. The truth about ethanol in your gas By Jeff Zurschmeide August 6, 2016 9:10AM PST Pull up to just about any gas station pump in America and you’ll see a sticker noting that the gas in that pump. Use pre-mixed ethanol free fuel for your power equipment. The fuel you describe; 91 octane, no ethanol, should be an excellent fuel for the 1. How to Minimize Fuel System Problems When Using Ethanol-Blended Gasoline. if it scores 0 on the octane scale, it burns as if it were 100% heptane (or one of heptane's isomers, I forget which one). If you add an octane booster to your fuel to make up for the efficiency you loose by running ethanol enhanced fuel, you are chasing your tail. A minimum of 87 octane/87 AKI (91 RON); If operating at high altitude, see below Gasoline with up to 10% ethanol (gasohol) or up to 15% MTBE (methyl tertiary butyl ether), is acceptable. If you score 100 on the octane scale, your fuel burns the same as if it were 100% octane. 87 vs 91 Octane Gas. Since some components of our engine are shared with the Flex Fuel version, you can run a BLEND of 91 octane and E85 to achieve what would effectively be E30. Vehicles get either 87 or 89 with 10%. Fuel additives such as octane boosters and lead substitutes are popular DIY purchases, especially among classic and muscle car owners, but these two products have more in common than you might think. Where to Buy Ethanol Free Gas at Airports Often airports have high octane ethanol free gas as it is safer to leave in a tank for a long time and does not absorb moisture which would be bad in very cold conditions like flying at altitude. I believe it is 92 octane. after resetting the code, it came back after another 50 miles. Each trip was over state roads with 55 mph speed limits and nine speed zones (traps) in each direction. From the factory, Ford typically designs the base calibration to allow use of 87+ octane fuel and recommends using 91+ octane fuel for optimal power. I run regular 87 octane with ethanol in my 1988 Johnson 150 for over 4 years now without any issues. Re: 87 octane with ethanol OR 91 octane ethanol free Have been repairing engines since the 60's and ethanol does not seen to create the problem in the older engines. Most of the newer engines won't have a problem with 10% ethanol in what ever octane is recommended for you outboard. But in some states all octanes of fuel have 10% ethanol in them. - Older fuel systems might have problems with the ethanol damaging non-metallic parts. running 87 octane with 10% ethanol? I have been running the 91 lately and I swear the truck runs better and I calculated an increase of 1. Although non-ethanol, regardless of the octane rating will provide substantially better fuels mileage (octane rating has nothing to do with power) most of the non-ethanol fuels being sold do not have a detergent package. It depends on if you need the octane and alcohol or not. If your scooter has an issue with 91 octane fuel then I suggest it has some kind of issue, maybe related to cooling. it was cheap ($154. You will likely not see a performance increase in a John Deere X320 by using higher octane fuels, which typically. Click to expand. I have experienced knock on hills with the 91 octane, none with the 10% ethanol 93 octane. The octane of E85 can be from 100 to 105 or so. All gas here is 91 and how they get it up to 93 is add the ethanol. Yes it calls for 91 min octane as do all Escalade's since 2007, do you have to run high test, no, but then why did you buy a 400 hp plus truck, like buying a Corvette and putting in the lowest grade fuel and wounding why it doesn't perform great. Using E10 in small engines usually does not present a problem. To tune for ethanol you need larger injectors or a program that lets more fuel thru the injectors on every fire. Have been researching until blue in the face and getting frustrated. Even then, care should be taken to not over do it. I buy 5 gallon steel cans of Race fuel. Propane and diesel (where available) qualify for single Bonus Bucks. Any experiences with Ethanol free lower octane of 89 or buy 91 octane with ethanol treated with Ethanol Fuel Treatment. Mixing about 3 gal 100 to 12 gal 91 gives me about 93, and there is a major difference in throttle response. First we had lead, then we had MTBE, now we have ethanol. Gasoline with 10% ethanol content is known as E10, and with 15% ethanol it’s known as E15. I just use normal 91 unleaded and my car runs just fine and idles great and gets about 10. • Must post octane rating. Premium 98-octane unleaded (PULP). At petro-canada branded gas stations, not selling ultra 94, the premium 91 octane gasoline does not contain ethanol. Searching for the difference between the different octane fuels generally only yielded results about whether you get more kpl (or mpg. · Premium unleaded gasoline (Octane 91 & 93) does not contain ethanol. So, please tell me the adv/disadv of 93-octane (10% ethanol) and 91-octane PURE gas. Fuel with a rating lower than 87 octane (91 RON) will negatively affect the emission control system performance and could also cause engine knocking and serious engine damage. Page 1 of 4 - 93 Octane w/10% Ethanol or 91 Octane with no Ethanol - posted in REV-XP / XS Chassis - Performance Trail 120-129 Inch Models: This would be for a 2012 MXZ X 800Etec. Ethanol flex fuel (formerly known as E85) has between 51 and 83% ethanol with the remainder being gasoline. Ethanol’s octane value. Wilsons fuel might have some in the 87 octane. 95 per gallon. The first. In most of SD only 89octane has ethanol in it and its 10%. The octane rating is a measurement that accounts for the resistance of fuel detonating prematurely during combustion in the engine. In Maine it is 91 octane. For competition engines operating over 7000 rpm. All things being equal, the fuel without ethanol will run better, cleaner, and more efficiently. Although non-ethanol, regardless of the octane rating will provide substantially better fuels mileage (octane rating has nothing to do with power) most of the non-ethanol fuels being sold do not have a detergent package. I saw 3 handles on pump (E10, 91, E100) As per my car specification, 95 octane fuel is a minimum requirement. That way the tree huggers can have there gas and us high performance drivers can have ours. I've been told by many experts, both here and elsewhere, that the octane doesn't affect MPG and that the lack of ethanol couldn't possibly make that much difference. The RON number is achieved from the results of lab tests in which the fuel is run through a test engine which varies its compression ratio under controlled conditions. The phase-separated water/ethanol mixture would settle on the bottom of the tank near the fuel pick-up and would quickly stall out or even damage your engine. If a fuel is 91 it's 91 regardless of the ethanol content. Blended at a minimum of around 6 percent, its pump stickers state "up to 10 percent ethanol" to account for. )/91+ recommended". Since the 30-year ethanol subsidy expiration in 2012, many retailers have switched to E-10 85-octane gasoline, which is advertised as 87-octane gasoline. The number 91 on the gas pump means that the fuel from that pump has the same ability to resist detonation as a fuel blend made up of 91% octane and 9% heptane. If your quad is running fine on 87 there is no reason to switch to 91. NOT ALL CountryMark Co-Op stations have such gasoline; in fact, most do not. The car was run on two types of fuels - 87 and 93 octane. Does ethanol affect horsepower or fuel-efficiency? Ethanol has a heating value of 76,000 BTU per gallon, which is approximately 30 percent less than gasoline's heating value (which is approximately 109,000 to 119,000 BTU/gal). 91 v 95 v 98 Octane. Be sure the racing fuel is unleaded! If the choice is run 91 or something higher arrived at by mixing leaded racing fuel with 91 run 91. One source cites an indolene MON of 87 and RON of 96. The discontinuation of our premium 94 Octane fuel comes as a result of changes to regulations that restrict the Reid Vapour Pressure (RVP) of. I did a little research on fuel Stoich values. I have very bad spark knock under acceleration no matter how the timing is set. It is a pure and stable fuel mixture that can be stored for up to two years in the original container and is ideal for machines that are used infrequently. If the car says ’98-octane Unleaded Only’ you must not use any of the lesser petrols,. It's a battle up here in NY to get days off from work that have nice boating weather, I average about 30-40 hours a year on the boat. That yields a final fuel rating of between 96 and 98 octane. We’re talking about ethanol, E85 fuel to be exact, and few topics are as polarizing in both consumer and enthusiast circles. While mixing 85 percent 108-octane ethanol with 15 percent 93 octane would yield something in the 102 octane range, the fact is that most manufacturers mix it with 84 octane or lower. I can't believe that I only got one response on this topic. And yes, the octane boosters like 104 do something. And just across the Potomac in Northern Virginia, the common premium is 93, and only 3 or 4 places sell 91. Using a higher octane fuel than what you need does nothing except lighten your wallet. This is for stations up to the muskoka area and from windsor to belleville. Depends on the state you live in. Octane is the most talked about property when it comes to gasoline. dont try to. Blended at a minimum of around 6 percent, its pump stickers state "up to 10 percent ethanol" to account for. In the US, a step-up of one grade of gasoline (regular to mid-grade, or mid-grade to premium), costs $0. 86 billion gallons of finished motor gasoline consumed in the United States contained about 14. Am I correct in this assumption? I run 93 in my cars and now my boat since I have found that I get better fuel economy in my car and it is supposed to burn cleaner and more efficient. 2 that requires 91. Fuel with a lower octane rating would obviously have an even shorter usable life. Will 110 and 91 stratify if left sitting for a month or so? Does anyone have an online ration calculator thats easy to use to see how much 110 I need to put into X amount of fuel at X octane to achieve 93?. I haven't had any fuel problems either, but my boat does sit for a while between uses. 7, So on 93 octane with 10 percent Ethanol, my AFR is 12. All gasoline brands have both pure and ethanol-containing gasoline under the same brand names. I can find that locally, but I can also get ethanol-free fuel locally. Effects of Fuel Octane Rating and Ethanol Content on Knock, Fuel Economy, and CO2 for a Turbocharged DI Engine. Higher octane (89/91) - in daily driving of the exact same route - seems to yield less mpg. I don't have any empirical evidence, but it sure does feel like the the engine enjoys the 91/93 more than any other octane rating. Only High Compression Engines will benefit for high octane, which burns SLOWER than lower octane. The problem started to show up in the last 5 years. Well here we are in the Winter months started up all my B&S engines on New Year's Day for a wake up call. Very next fuel station was United. If your engine has a high compression ratio, uses a turbocharger, or is otherwise "high-performance," you will most likely be required to use 91 octane or above. One of them is Brazil, where by law all fuels need to have at least 20% Ethanol. Shell 91 Octane has NO Ethanol in the premium blend and has no plans to change that in the near future. The official word is that the Shell V-power 91 octane (gold) will not have any ethanol in it. The pump gas in my marina is…. It requires 91 octane fuel. The chief benefit to the Smart car, is the. if the price is not an issue run the one that does not have ethanol. So you just bought E10. When you put premium into the tank, the computer will run the high octane table giving you greater performance and usually better fuel economy. Around here, my gas is 93, when I have been places where the highest is 91, I observed no difference. at least around here they usually sell e0 90octane. Sunoco 116-Octane Racing Fuel. So when 10 % ethanol is added at the distribution point to base 87 octane fuel, the end result is a fuel of about 2 points higher. Octane ratings are essentially the resistance of a particular fuel to pre-ignition. If your quad is running fine on 87 there is no reason to switch to 91. The engine will adjust the timing so as to protect itself by lower the power output. It depends on if you need the octane and alcohol or not. In Maine it is 91 octane. As for higher octane with ethanol in it around here that is rare, mostly in the lower octane fuels only. Since about 2006, gas stations have been putting up pump stickers saying "this fuel may contain up to 10% ethanol". There is a couple of versions in the unleaded, no ethanol, 94+ octane range, 100 octane, and then starting around 108 or 110 octane, they are leaded. 143 cents per litre (cpl) (excise equivalent) customs duty on fuel ethanol imported into Australia. I don't think ethanol is inherently low octane, infact it seems to be added to fuels commonly to boost the octane. , unleaded gasoline typically has octane ratings of 87 (regular), 88–90 (midgrade), and 91–94 (premium). Some distributors have other blends, such as e3 (3 percent ethanol). This TruFuel is obviously more expensive than regular gas but it stores much longer, is ethanol-free, and is 92 octane (that's premium gas). I have very bad spark knock under acceleration no matter how the timing is set. I’d much rather have ethanol-free 91 than ethanol-laden 94, unless I had a vehicle with the boost turned up too high for 91. For these reasons, and perhaps others, we often seek out gas stations which can provide ethanol-free fuel and that isn't easy without knowing what's being provided. (R+M)/2 is how ordinary fuels are rated in the US. Whether you fill up with Regular (87 octane), Plus (89 octane), Premium (91 octane) or Ultra (R) 93 grade of fuel, rest assured you're getting the very best at the pump. 87 Octane? 89 Octane? 91-93 Octane?. 93 Octane No Ethanol In Small Engines. EPA reports it does not have the authority to include ethanol-gasoline fuel blends with an ethanol component greater than 10% in the ethanol waiver for the RVP requirements. 5 per cent increase in fuel consumption. I have settled on a very steady average 14. I noticed that the ethanol-free was $2. ) with 98 RON as opposed to 91 RON & whether this increased kpl offsets the cost etc. Not power, not mpg, not cleanliness. The primary difference between gasohol 95 and gasohol 91 is that the 10% ethanol is mixed with 95 octane gasoline in the case of gasohol 95 and 91 octane gasoline in the case of gasohol 91. The cooling effect of ethanol lowers the combustion temperature which in turn lowers the octane needs of the engine. During the 1920s, Standard Oil started to add ethanol to gasoline to reduce engine knocking and increase octane. Here, in my area of Western SD, I have a choice of 87 (with 10% Ethanol), 88 (with 10% Ethanol) and 91 Octane which is pure gasoline. 5:1 head is probably unnecessary. i don't worry about the cost. Since changing, I've switched over to 10% so that 91 octane is more easily obtained, but it has definitely made a dent in fuel mileage. It does have a knock sensor There are many WAWA stations around that have dedicated hoses for 89 octane ethanol free fuel. Here in North Georgia, 10% ethanol gasoline is the norm. I took a contracting job two counties away and made 27 round trips of 120 miles each on 91 octane ethanol free gas over the last two months. 5L direct injection turbocharged (EcoBoost) engine at three compression ratios (CRs). However, EPA recently reported that it is undertaking a statutory analysis of the RVP waiver for inclusion of E15. On a normal functioning scooter 91 vs 95 makes zero difference. In addition to having lower lifecycle greenhouse gas emissions than conventional gasoline, ethanol is an excellent octane provider, with neat (pure) ethanol having an octane rating of over 100. Shell Unleaded 91 Low Aromatic is specially designed unleaded petrol which complies with the Australian Fuel Quality Standards Act, and which has an octane rating of 91 (the same as regular unleaded petrol) and meets the quality standards Shell requires from all its fuels. Wondered if Ethanol would be a good mix into RP-1 for a Rocket fuel. if it scores 0 on the octane scale, it burns as if it were 100% heptane (or one of heptane's isomers, I forget which one). One for LOW octane and the other for HIGH octane fuel. To be safe I used the 93 octane, figuring if the ethanol did any strange things I'd still have 2 points to spare and I'd still be safe. Esso 91 doesn't have ethanol in greater Toronto area. Ethanol - Wikipedia, the free encyclopedia The reason performance cars use higher octane is to enhance when and how the fuel burns. This code had something to do with emission. Similar to Unleaded 87, it can also be used for watercraft's, ATV’s, small-engine yard equipment and 1990 era veh.