Personally I think one of the best ways to ensure your ability to travel is to own a surplus military vehicle. While not always the most popular, they run… older ones will run even if an EMP goes off.
I personally own a M998 troop transport. My HUMVEE is my pickup truck. And, even though it is 18°F out this morning, it will start.
With that being said, finding parts or knowing where to find parts can be hard.
These places may help you out!
I know I search quite a bit for what should be easy to find parts… but are nearly impossible to find.