In Xenoblade Chronicles X, you get a Skell (a mech). It runs on "fuel."Because I've not played two of those games [and it's been ages since I played Final Fantasy VII and I did not complete much of it], would you mind sharing how this feature was implemented in those and other games - as in how did you as a player go about fueling your vehicle??
The "fuel" can recharge when you're not in it, when you're in it in certain weather conditions, when you defeat enemies, and when you buy "fuel" in town.
It's nothing special. It's just a slight mechanic that's there.