For 1 thing you could try is running a cat converter on them and tuning the engine so it woulden't burn them up. Hopefully your not 1 of those tree huggers that want to make hotrods and classics have to pass a current emissions test, then you are an enemy but, you obviously respect Hotrods so I doubt it. Enjoy your stay at CHR. I belive there will always be oil because it's made up of old rotting like trees getting compressed underground and such, so in theroy, as long as there are trees rotting under the ground rotting and getting compressed, there will be oil, because we do not know how many of these rotting/ compressing trees and plantlife there, that is why nobody knows how much oil we actully have.