Home › Forum › Ask A Member › Ethanol vs premium › Re: Ethanol vs premium
June 25, 2016 at 7:55 pm
#38954
Typically 87 and 89 octane have ethanol and 91 or 93 is ethanol free. The only down side to running higher octane then needed is you would get slightly better gas mileage running lower octane since the lower octane is easier to burn. But I don’t recommend running ethanol in anything that you don’t use daily. Once ethanol sits it starts gumming up everything and eating certain rubber fuel hose.