I don't know how you can drive @50mph and not get run over even on 4 lane roads, just pulled my 5th from Regina this past summer and 110kph was about as slow as i could go with out getting run over, so much for that, I have tuned lots of gas engine's in the last 50 yrs and one thing you got was extra power but milage did very little change and those engine's were done by a good engine builder in Selah Washington that are famous for the circle track racing crowd. Just my thoughts but I only pull with an ole 5.9 400hp Cummins that is chipped.
