There's a finite amount of local and regional fuel storage and when the infrastructure breaks down over a bigger area, and the local reserves get used up, that diesel delivery won't be so regular.
FWIW, AAA Colorado used to be a client and their infrastructure kinda sucked. Pretty sure they also only have one genset, and we all know that 2 is 1, and 1 is none.
I believe that only CNG is going to survive long term as a viable - renewable - and easily transportable, self-sustaining to it's own infrastructure, fuel.
For the average Joe, you're fucked because retail pumping stations aren't going to have power to deliver the fuel to your tank.
LOL, obviously. In a total infrastructure shut down, no one is going to be worrying about changing flat tires and jump starting cars.