A Salem man claims he has designed a car that can drive 700 miles on just five gallons of gas. Mike Hargett's car has a two battery system that includes a gas generator to charge one set of batteries as it drives. It’s small and green with three tires. Hargett hopes to eventually put the technology in vans and RV's and even tractor-trailers The car will be on display at the State Capitol in Salem this morning.