How to identify what octane your car needs: First, open the fuel filler door. The maximum amount of alcohol currently allowed in standard E-10 fuel is 10% at all octane ratings. High octane only helps if you have a high compression engine and the higher octane is there to keep the engine from experiencing Pre-detonation which can be โ€ฆ Hi Folks: Hope I got this post in the right place. What Octane Fuel Should I use for my Toyota? I googled a little and apparently in some high altitude area there was the thought no longer true that older cars could operate as well on 85 as 87 in high altitude places and minimums are stuck at 85 and you โ€ฆ For optimum engine performance and driveability, it is required that you use premium grade unleaded gasoline. According to Polaris, most of their off-road vehicles should run 87 octane while the RZR Turbo and Pro XP models require 91 octane.They also warn not to use fuel with more the 10% ethanol. Thus, octane is the measurement of a fuelโ€™s resistance to knock and is on a scale of 1-100. The Toyota vehicles of today are well-equipped to bring you high amounts of performance and adrenaline, from the time that you turn on the ignition to when you press the gas and let loose on the road. Consult the Owner's Manual for more โ€ฆ STIHL MotoMix® is a high-grade, high-octane, ethanol-free premixed fuel containing STIHL HP Ultra โ€ฆ Both brands of pro saws are designed to burn fuel rated at 89 octane or higher. But with the 1200cc Evolution and the 1247cc Revolution, use high octane. I have personally used 89 octane fuel for extensive periods with no discernible notice in performance or mileage. E85 is rated at 100-plus octane, up to 105 octane or more. Basically, if you drive a GS, IS, RC coupe, LS, GX or LX โ€“ always use the higher octane fuel so you can get the performance and fuel economy these models should give you. This petrol is considered 91 octane by the (R+M)/2 method. Your new vehicle is designed to use only unleaded fuel having an octane number ((R+M)/2) of 87. However, if you experience loud or heavy knocking using fuel with the recommended octane rating, see your authorized dealer to prevent any further โ€ฆ Racing fuel typically has a higher octane rating, such as 98-octane Sunoco Green E15. This is a topic that's been debated quite often. Some people believe higher octane fuels burn "slower" and hence will actually reduce performance in a engine that doesn't require higher octane fuel. If youโ€™re vehicle falls into the latter category, thereโ€™s no need to use โ€ฆ All gasoline is not created equal. VW recommends using 91 octane, but most US gas stations only sell 87, 89, or 93 octane fuel. As said above I run 93 and my truck seems to run smoother than it did on 87. If premium unleaded gasoline is not available, regular unleaded gasoline with an octane rating of 87 AKI or higher may be temporarily used. Of course, if your car is designed to run on 95 or 98 octane petrol, you must use the octane rating that has been specified by the manufacturer, otherwise you risk causing damage to the engine. There is no reason to use a higher octane of fuel if the engine does not knock or ping. High-Octane Fuel. Octane rating has nothing to do with the "quality" of the fuel or level of ethanol. Photo by Kenneth Stone. Should I use low octane gasoline (85, 87, 89) on my Mercedes-Benz? If your car was made since the late 1980s, use whatever fuel is recommended in the owner's manual. Advice on what to run in what motorcycle is dispensed as freely in America as fuel itself, with varying levels of understanding as to when fuel of a given octane rating should be selected and used. So why does the higher octane exist? it is used when the engine has a tendency to detonate, this tendency increases with compression ratio or forced induction. If the fuel flap says โ€˜premium unleaded onlyโ€™ it means you need to use at least 95. Some Mercedes-Benz models before 1980 require gasoline that is leaded and has an octane rating of 97 to 100. Re: What octane gas is best to use for a two stroke outboard motor. When in doubt you can always reference your ownerโ€™s manual or just give us a call at 210-816-5000 to speak with our service team at North Park โ€ฆ Of course, the 91 octane level is the minimum fuel type that should be put into the vehicle. If you donโ€™t know what fuel you should be running your vehicle on, seek advice from the local dealer that services your brand of car. Regular fuel is defined as having an octane rating of 87. Gotta 09 Ultra stock. Here in New York we have 87, 89, or 93 octane fuel. Next, look at the gas cap and the inside of the fuel filler door. So why does Harley-Davidson advise all of its fuel-injected motorcycle owners to use high octane fuel? Octane rating determines how quickly the fuel will ignite when in your engine. Owners manual says to use a minimum octane of 91. Although using higher octane gasolines are a waste of $, on the other hand, more pricey gasolines have better cleaning solvents than cheaper ones, will clean better, burn better, produce less carbon buil up on pistons & cylinder head specially if you โ€ฆ To make an informed decision regarding quality of fuel to use, we suggest you visit the following website โ€œtoptierfuels.comโ€ This is an independent fuel โ€ฆ Recommended octane levels for new Toyota vehicles . In addition, most modern cars have a knock sensor, so if the engine is under load (low rpm, open throttle) and it begins knocking, the system should retard the ignition timing until โ€ฆ A handful of fuel suppliers in the UK do offer high-octane petrol, which is often billed as โ€œperformance-enhancingโ€. It canโ€™t hurt your engine if you use a higher octane fuel. Use of 91 AKI fuel will not affect your warranty coverage. Those items are completely separate from the octane rating. Premium Unleaded Petrol (PULP 95 RON) is also acceptable. To start, both Stihl and Husqvarna recommend the use of high octane unleaded gasoline. So, if your 2019 Lexus falls into the first category above, you should be pouring premium gasoline down its throat. Quote As for using a fuel with a higher octane rating that required, well that's a complicated discussion. Mostly โ€ฆ If you car doesn't detonate at 87 or 85, โ€ฆ However, if your Subaru is turbocharged and/or carries a fuel octane warning, always follow the advice in your ownerโ€™s manual and use only premium-grade gasoline. What should you use? A modern car has a digital engine-management system with a calibrated spark-advance profile for a certain amount of octane in the fuel. Generally speaking, you should be safe to run 87 octane on a 103ci Twin Cam Harley because its compression ratio is less than 10:1. โ€ฆ One of these should have the recommended octane fuel for the vehicle written on it. Designed for sports cars, these fuels have a high-octane rating that suits older engines, but be warned as some still contain up to 5% ethanol. If you exclusively use E85 fuel, it is recommended to fill the fuel tank with regular unleaded gasoline at each scheduled oil change. You should drive the vehicle immediately after refueling for at least 5 miles (8 km) to allow the vehicle to adapt to the change in ethanol concentration. My people are under the impression that it is beneficial to use a high octane or premium gasoline (90 or higher octane) for their Toyota. Most regular grade fuel has an octane rating of about 87. You should use whatever octane is recommended by the manufacturer. What type of fuel can I use? If you hear it, it probably means your car needs a tune-up, not better gas. So the longer fuel sits around, the more octane it loses, just like soda loses carbonation, fuel will eventually go flat (and it smells bad) thou it does take a long time, still, the โ€ฆ Premium vs. regular is not a difference in gasoline quality; one is not better or worse than the other. Higher octane fuel costs more than regular unleaded, but is it worth using 98RON if your car is recommended for 91RON, many say that you should. The 5.3L only needs 87 octane but the 6.2L needs 91 octane minimum. With a higher octane, the air/fuel mixture can endure higher compression without combusting. This is not enough. Donโ€™t be too worried about small pings and light knocks. Use a minimum of 89 octane gasoline and always use fresh fuel. If you use a snowblower to clear your driveway and walkways, you may be wondering what kind of gas is the best to use in it. I've just bought a Japanese 2008 Honda Edix 2.0Litre The dealer says that all cars run better on 95, I'm skeptical, as I've just moved on from a very similar 2003 Honda Odyssey that I've run for ten years on 91. Add fuel octane to the list. So, for example, if you use 95 or 98 in an engine designed for 91, thatโ€™s OK. The fact is no Toyota, (Other than the Toyota Supra that has a BMW engine) uses a grade of gasoline above higher than 87. If your car is really old โ€” we're talking 1970s or earlier โ€” you may need to use 89 octane or better, and you should listen for pre-ignition knock. The common fuel ratings (87, for instance) refer to the composition of gasoline. Alcohol actually raises the octane rating in fuel since pure alcohol (ethanol) has an octane โ€ฆ Putting a higher octane, such as 93, is not necessary but it might slightly increase the power output of the engine. If the fuel flap tells you to use 98, thatโ€™s what you need to do. People will say the computer will compensate for knock at 87 octane at the cost of a little power we won't notice. A majority of gas stations will provide drivers with three grades of fuel โ€“ Regular 87-Octane, Mid-Grade 89-Octane and Premium 91-Octane. Any advice if i should run this "pure" gas (91 octane) versus the stuff that has alcohol added (92/93 octane). Only buy enough gasoline that you can easily use up within a two-month period or use a specially formulated fuel mixture like STIHL MotoMix® Premixed Fuel. What kind of fuel can I run in my UTV? To label a fuel as premium, it should have an octane rating of 91 or higher. High octane gasoline is specially refined for higher compression engines to prevent knocking. The Octane has nothing to do with Quality, it is simply the ratio of different types of hydrocarbons in the fuel. Which Octane fuel to use? The octane rating is defined as the โ€“ measure of the fuelโ€™s ability to resist engine knock and burn cleanerโ€“ and a higher octane rating will burn more efficiently and more cleanly. What Octane Rating Should I Use? Higher octane fuel burns slower, reducing the chance of pinging or knocking in high-compression engines. MerCruiser engines will operate satisfactorily when using a major brand of automotive unleaded fuel meeting the following specifications: Posted Pump Octane Rating of 91 RON minimum. You should run what ever fuel the manufacture recommends. The difference between the gasoline grade is the octane rating. For a small engine that is generally only used part of the year โ€“ the coldest part โ€“ it is important to keep a few things in mind as you choose fuel for your snowblower. Yes, you can watch fuel develop bubbles when it's in the heat, and I swear it acts like soda, and as those bubbles develop, your fuel loses octane. 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