well, finally towed heavy"ish" with the 1.5.. even more sold, it still gets a little toasty doing anything but cruising flat in od locked at or below 1800rpm. but that could be just cause I was on the hotter of my two tow tunes. (roughly 12-13k bumper pull) ... still completely sold on this charger. oh and mpg is up from low 9s to mid 11s pulling the same load over the same route. (just by the lie-o-meter)