You're renting it for a few minutes at a time while not caring what it is other than "at least a generic sort of car" or whether it's the same one each time? Su

You're renting it for a few minutes at a time while not caring what it is other than "at least a generic sort of car" or whether it's the same one each time? Sure. You're renting it long term? That's like leasing a very specific car, so no not really.