Better Fuel Economy

Owners manuals are notorious for recommending a middle or upper grade of fuel. These sections often are written by lawyers, not mechanics. They don't want you to sue their car company for making an inferior recommendation. To be sure, there are some models that require a high-performance grade. Those are few. Check with your mechanic and find out how well your engine will run on regular unleaded as opposed to a more expensive blend. Then, do the math. Paying an additional 10-20 cents per gallon will cost you the equivalent of about ten fill-ups a year. Unless it's necessary, are you willing to pay that much just so you can claim a better grade of gasoline is in the tank?