Originally Posted by timmytVA
Sonic ... I've seen several references to using premium in our cars. Any empirical evidence of performance or MPG increases?
Regular is $3.759 and premium $3.999 in my area. That's a 6.4% price difference. Will I see a 6.4% MPG difference?
Tim, if you want empirical data check out the numerous MPG/Power threads, you'll be disappointed to a point. All I can say is try it for yourself and see. It all depends on your goals for your car.
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