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Frequently Asked Questions

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Octane Recommendations

What should be the octane rating of my fuel?

It is recommended that fuel with a minimum of 87 octane / 87 AKI (91 RON) is used in our engines. For altitudes above 5,000 feet (1524 meters), a minimum 85 octane / 85 AKI (89 RON) gasoline is acceptable.

Since small engines operate at relatively low compression ratios, knocking is seldom a problem, and using gasoline with a higher octane rating is unlikely to offer any benefit.

For related information regarding fuel, please visit our Fuel Recommendations FAQ.

NOTE: We DO NOT recommend the use of gasoline which contains alcohol, such as gasohol or E85. Gasoline used MUST NOT contain more than 10 percent Ethanol and MUST be removed from the engine during storage if it is not already treated with our Advanced Formula Fuel Treatment & Stabilizer. DO NOT use gasoline containing Methanol. DO NOT use E85 fuel.

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