auxiliary fuel tank for diesel truck

I have one. For reasons other than RVing. But it sure comes in handy when towing. I tow very long distances, through more than one state. It's nice to be able to pick and choose how and when I fill up.

Make sure you put some fuel stabilizer in the tank and/or use it periodically. I do both. Can't go wrong.

Mine is not hooked into the system. Has an external pump. Allows me to fill anything, not just my tank