If you drive 12,000 miles a year (and I think most on this forum drive considerably less than that), you're talking less than a hundred bucks a year, or $8 a month to run Premium vs. 87 Octane in your car. Sheesh...what next - get some deals on used tires and batteries? Don't drive over 55 on the highway? Hey, I know...just park it in your driveway and don't drive it at all...think of all the money you'll save !