I don't see where it's worth risking mechanical issues and decreased mileage when it's only about $2 more for 10 gallons of gas when you buy premium over regular. Considering it's been my experience that running premium fuel gives better mileage and runs more efficiently I think it's worth it. Not to mention the manufacturer wouldn't have recommended it as the minimum if you'd get the best performance from a lower grade gas. Just my two cents though.