This plugin allows you to set whether various objects should consume fuel or not. This can also be permission based, so the if the owner of said object has the required permission no fuel will be used.
It requires that one single item is added as fuel, it won't ever use it however. How this works is, whenever it goes to consume fuel, it adds 1 fuel before it takes a single fuel away. This doesn't cause duping because it's so fast, but this was the cleanest easiest way to make things...