You could also siphon your heating oil into your diesel car, with the problem that you are not paying for your share of road use. It also becomes an interestin

You could also siphon your heating oil into your diesel car, with the problem that you are not paying for your share of road use. It also becomes an interesting conundrum with electric cars. In one sense their externalities in terms of environmental impact and geopolitical costs are generally much lower than conventional cars, but they are not paying for their use of public roads. Of course that also means that if you limit your consideration to the road only, someone driving a lightweight Ferrari that gets 13MPG is really helping out with the cost of roads, even if they are also needlessly contributing a lot of carbon to the atmosphere.