Thanks for the article.. It fims up what the mechanics I've been talking too have said. Less performance, not great for those of you that want to run with your hair on fire, but the computer does take care of the knocking problem.
I'm sure the oil companies love to sell that premium gasoline, but then there is a sucker born every second I've heard. I try to use good sense and run premium if I'm going to push the car hard, but around town I really don't see the difference even in the mileage improvement that I'm sure is supposed to happen if you run premium.