"80% of the carbon emissions from gasoline come from making the wheels turn."

Not even close. From well to wheel, maybe 10%, if that. From the energy overhead of exploration to production to refining to transportation to end-use in inefficient small internal combustion engines (where ~75% of the energy is wasted as heat), ending up warming the air, tires and brake rotors, it would be hard to design a less energy efficient way to move people and goods.