Here reg is 3.58...premium is 3.88. If I run regular I get around 10 MPG. For the extra 30 cents I get around 16. So for me, the payoff works. The 50% increase in mileage isn't equal to a 50% increase in the price of regular regular so even though it cost more, I'm actually saving money.
At 3.88 for premium and 16 MPG
A 50% increase in regular would mean I have to pay 4.66 for the same mileage. So I still use the premium.
Last edited by Warlock III; 05-01-2012 at 10:19 PM.