April 1967. Hosted by Consumer's Power Co., the Mars II was driven from Detroit to Cadillac, Michigan, with charge points that had been set up in Flint, Saginaw, and Claire. Cost of recharging averaged about 1/2 cent per mile, compared to a 1-1/2 to 2 cents per mile average for internal combustion-powered cars. "When a gasoline company representative showed an interest in the car this morning, Aronson told him this was the only electric car to use gasoline also. "It has a gasoline heater system and uses about 20 cents worth of gasoline a week."
