Dang, I have to admit I've never even looked at the price of premium gas since my last Corvette. Is it really a 60-cent/gal. difference? Wow! If it makes you feel better, pick up a bottle of STP fuel treatment at Wally World for $1.50 every couple months. That's 10% of the EXTRA you'd pay for a tank of premium. (still a waste of money though)