Mileage??? Cooooooool. I love my Smarty and the Revo software. Too bad I'll be out of the country for nearly two years with the RAM parked... Though that will allow me to buy a new G56 since the old one only lasted 156K running a quart low towing most every day (I tell ya, if you hear a noise that is getting louder and louder check HERE on TDR to see if anyone has ideas - the dealer simply changed gearbox oil for me every 15-20K until the oil was "full" - too bad my G56 was one that needs another quart to be full). Anyway, the Smarty rocks.