The desert offers an tremendous amount of oil shale which you can convert into gas that you will be supplied for the next 150 in-game years with it. If you can find a working chemistry station inside a POI which I have seen multiple times around. The perk for it is relatively cheap to access to as it only wants level 2 grease monkey. I have so many stack of gas cans laying around that I do not find the space to store them anywhere at all.