Your last point is the tough part. True, actual manufacturing doesn't have to use lots of oil, but there's still a hefty supply chain network that does. Years ago I read an article showing how various car parts for an "American" car came from nearly two dozen countries, in almost every continent. Even if it's a container ship with 10,000,000 car parts (which is about as efficient as transportation can get) that's still an oil footprint being left behind. Even if they're Tesla parts.