Cadillac World Thorium Fuel concept #car - otherwise known as the Cadillac WTF? Powered by a turbine electric generator system. A thorium-based laser generates heat and produces steam in a closed-loop system. This powers a generator to produce electricity. Just 8 grams of thorium could be enough to power a car for 300,000 miles. Each "wheel" is a combined unit of 6 individual wheels, each with its own induction motor.