Yeah cuz there wont be any gas left in any of our other cars or anything like that....LOL.
I will have plenty of gas to bug out to my hidey hole.
Gasoline will be quickly siphoned out of abandoned vehicles in a serious SHTF scenario. However, transmission fluid in those abandoned cars and trucks will be around for a long time and can be used in a pinch as fuel in diesel vehicles. Better be an older one, though, since a modern diesel with modern electronics will be just as useless as any modern vehicle (at least in theory).