So, with the prices for fuel going up and up. Has anyone else decided to drop a level on fuel? I've started putting mid-grade in the SHO, since it's as much as Premium was. Top tier fuel is over 5 bucks a gallon for Premium here now. Just did it yesterday as I was at half a tank anyway. Guess I'll see how well the factory auto octane sensor works and if my mileage goes down any.