There was one but by another name. My wife worked for a solar chip company (think space) in the mid 60's in LA. they manufactured chips for NASA and space platforms. The owner converted a Nash Metro to run on chips and he drove it all the time in LA. There was another Metro converted to a battery electric motors and a small lawnmower engine to run a generator and they said it could go from LA to NY on about 10 gallons of gas at 50 mph, around that same time.