Will a Fuel Saver work on fuel injection engines, carburetor engines, air cooled engines or hybrid cars?
Yes to all. The FuelAid works by effecting the fuel, not the engine (though it does remove the unburnt fuel from the engine), so it works on various types of engines and fuel delivery systems. It should be noted, however, that the FuelAid is a complete system enabling it to do so, unlike many of our pseudo-competitors whose products only work on carburetor engines.
