When I bought my truck it came with a auxiliary diesel mounted in the bed of the truck. It has a pump and electric fuel valve to transfer the fuel and is larger then my main fuel tank. My question is ...
I have a 60 gal RDS tank/toolbox on my ford dually, with electric shutoff tied to one of my upfitter switches, gravity feed when on. Gives me 98 gals, at 10mpg, just under a 1000 miles towing the FW.