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For area that have 10% ethanol in their gas, its best to use 89 octane. There is less ethanol with higher octane. The 87 octane with ethanol really takes a toll on the float seal, just eats it up. Ethanol tends to have a little more water in the fuel over time. I know several people that use 93 or 94 octane for the mowers. That is over kill and 89 will be fine.

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14y ago

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