Desert Captain wrote:
Try rereading my post... I did NOT say using Tow Haul will improve your mileage. :S That is not its function but in the course of making your drive train more efficient you will in some circumstances actually get better mileage than without it.
Amount other things using TH reduces your trans fluid temperatures significantly contributing to overall efficiency and again, sometimes better mileage. If you are not using TH you are slowly but surely cooking your transmission needlessly.
Since everyone loads differently it only makes sense to use the GVWR of the E-450 {14,500#} for the purposes of this discussion. Most E-450 class C's and virtually all of them over 30 run very close, if not over that number due to their inherent lack of payload. Oh and I do have to ask, why one earth would you run "fully loaded {all tanks full...} ??? Do you enjoy hauling full black and grey tanks? :h
:C
I did that test to find out if I was overloading the Driver's side. And I was--so I changed rims to a taller tire which more load rating. I don't know why--but the battery bank, water tank, and waste tanks are ALL on the drivers side. My battery bank at the time was 875 amp-hours. The driver's side duals were the over load. I also had a cage created that favors the passengers side for the generator. Every little bit helps.
Of course for NORMAL use I do not have the water, grey, and black full.
My terrain is mostly prairies. I accelerate slowly.
