Over Drive
I have always wondered if I put an overdrive unit on my RV will do any good. If it gives you a 10% decrease in RMPs does it give you 10% better gas mileage? Or just 2 or 3% better MPGs. Would it be wo...
Forum Discussion
tempforce wrote:My 8.1 Chevy Vortec in OD (Allison Trans), I get my max fuel milage at 1900 RPM, 59 MPH, hope this helps you!
what rpm is the engine turning at 60 mph?
