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...
I get about 7mpg. If I added an OD transmission, would 8mpg may be out of the question? That is a %14 increase in mileage. On a 100 gallon trip, would save about $50 @ $3.50/gallon. Is my math close?
Like someone said, another benefit would be less engine wear and lower noise.