dwb619 wrote:
It's all about convenience, range , and ability to chose when and where to refill.
That was it in a nutshell for me. Put a 65 (IIRC) gallon tank in the back of the F350. From American Tank in FRisco TX. Cost $1000 or so, but was fully installed, fully plumbed, came with an aux switch so that I could switch between factory and aux tank.
Lost some (not all) space in the bed, but this combo gave me 1200 miles of towing range. I just found it incredibly convenient to be able to drop the trailer, go out for dinner, and fuel up just the truck. No more looking for fuel during the day and if we stopped at a Travel Center, it was because of want-to or convenience, no longer of necessity.
Auxiliary tank was prompted by a midnight drop the trailer off at Kroger, drive truck across street, fill up and re-hook. My own fault for not planning, but never again.