Going on trips started to suck. Every place i go I get about 7.5-8 until I can get on an interstate. Pismo Beach, Southern Cali, etc. all good hills for a extended period of time.
Some advice. I would not get a tank 60" wide, this was bad enough. The tabs on the side had to be bent up because of the bed of the truck. I would put a fuel filter in line of the before the fill tube of the truck. I already clogged the first one I put in. Must have been some crap left in the tank. Works great so far, an extra 60 gallons works great.