grizz272 wrote:
What is a good size for a aux tank? Do you have it plumbed right in to the truck or do you transfer as needed?
I run a RDS 51 gallon aux tank/ toolbox combo. The toolbox is sort of worthless, but large enough to carry a decent socket set, jumper cables, and miscellaneous items. I use their gravity fed kit to connect it to the fuel filler of the truck, which requires drilling a 3/4" hole in the bed to run the line through. It has a ball valve you open and close to open or cut fuel flow between tanks - depending on your year model, keeping it open may throw a CEL (fuel level indicator malfuction, or something like that), so I have to keep mine closed most of the time and open it only when I want to transfer fuel. It doesn't fill very quickly - but does outpace the rate at which my 15K fiver sucks fuel down, and I can drive a hundred or so miles with it filling the tank before the CEL comes on. Or you could just fill it when stopped, and never have to worry about it.