Join Date: Feb 2018
You can try running some E85 in your car. E85 has an octane rating of 100+. It's cheaper per gallon than 91. However your overall gas mileage will go down some. Don't waste your money on those little 12-oz bottles of octane boost you see at the automotive store. They claim they raise your octane by 3 or 4 points. That's DECIMAL POINTS! So your 91 octane gas + 12-oz of octane booster = 91.4 octane gas. It would be cheaper to just buy race gas.
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