[beatr911]

Don't know if they have low tension rings or single ring pistons for an engine your size. The only reason I mentioned it was that the MPG optimized Metro XFi uses single ring pistons. One sealing ring and one oil control ring vs. the usual two sealing rings and one oil control ring. Total Seal I hear makes "gapless" rings which may be a help.

I love dual purpose vehicles that do it efficiently. Some day I hope to have a fun autocross/track day car that gets 40+ mpg on the street. I applaud you for considering good mpg with good off-road capability, it shouldn't be mutually exclusive.