By default, it has a gas tank that takes flamer fuel in order go run. You can purchase upgrades for it like a chemistry set.

The Winnebago also allows for a little customization.

I'll get inside the truck and take it to I-88 where my Winnebago is waiting. I'll complete it and come back over encumbered. Like, I will take the mtb to the area where you start honest hearts. The mbt and Winnebago share a few destinations, but the Winnebago seems more suited to settlements while the mtb leans more towards frequented areas and dlc entrances. No fast travel, unless it's by car or vehicle. Together they act like a better form of fast travel if you're doing what I do.

It's like the mobile truck base, but a bit more spacious.