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- Clean, fresh, unleaded.
- 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.
- A canned fuel product such as Briggs & Stratton Advanced Formula Ethanol-Free Fuel can also be used.
Also asked, what is the best gas to use in small engines?
Ethanol-free Gas Non-ethanol fuel is far more reliable than ethanol-blended fuel. This is because it is not as susceptible to condensation, corrosion and rust issues. Most non-ethanol gas is rated at about 89 octane, which is fine for small engines.
Also asked, is it OK to use premium gas in small engines?
Premium gas, such as 93 octane, helps high-powered cars run smoothly and efficiently. There's no need to run a small lawnmower engine on high-octane gas, but it won't hurt your lawnmower, either. The only harm might be the dent left in your wallet from using the more expensive fuel.
Most four-stroke engines require fresh unleaded gasoline with an octane rating of 87 or higher. You can use gas with ethanol, but more than 10 percent ethanol is typically not recommended. Mowers with two-stroke engines use that same type of gas, but with the addition of a high-quality two-cycle engine oil.