The H-M-Vehicles Free-Way (H-M meaning high mileage) was a three-wheel microcar manufactured in Burnsville, Minnesota, from 1979 to 1982.These small commuter cars had a single seat and were powered by a 12 or 16 horsepower gasoline engine or a 4 hp electric motor. A diesel engine was offered, but none were ordered with it.The 12 HP version was guaranteed to get 100 mpg-US (2.4 L/100 km; 120 mpg-imp) when driven at a steady 40 mph (64 km/h).