Two of the leading producers of propane-injection systems for light-duty and medium-duty vehicles – Cleanfuel USA and Roush – have received Environmental Protection Agency (EPA) approval for their new-vehicle systems.
Liquid Propane Injection
LPG has come to the masses massive, with ROUSH introducing a conversion for the Ford F-250. The changes are minimal: fuel tank and pump, stainless steel fuel lines, aluminum fuel rails and PCM calibration. They'll mean cheaper running costs but no loss of horsepower, torque or towing capacity. Depending on which conversion you choose, though, you could lose bed capacity: an under bed tank provides a 250-mile range, or a 62-gallon tank that goes in the bed means 500 miles of running.