RE:Price of GasOf course I believe this will have a fuel saving component, if you ever had experience blending fuels, compressing air, cooling air, pressurizing the furl rail, replacing cams on valves using electronic operated valves and being able to adjust for air temps, driver and this adjusting air content, tailpipe, engine temp, burn rate and engine performance on a Diesel engine, and electric generating can be place on axles to reduce brake wear or on downhill or slowing down, so electric generating not need to be from engine torque, IMO