I've always had good experience with over-inflation -- it's almost a requirement in autocross. This helps prevent the sidewalls from folding under hard cornering. It's also right that less contact patch is on the road at cruise -- the middle section of the tire bulges out onto the pavement, which wears-out first = the bottom line of less rolling resistance. Thanks for the advice. I'll try a few things out. The goal is to get the combined mpg up to 30.

RH77