Many cars on our roads have an auto LPG system fitted to them, to provide cheaper motoring and help the environment. Auto servicing of these cars is not only more involved than petrol or diesel powered vehicles, but far more critical. Due to the efficiency of LPG being highly influenced by other factors, car tune up and keep the ignition system performing at its peak is critical. Any shortfall in the ignition system will cause backfires which may then lead to explosions in the intake area that can break air cleaner housings, intake pipes or even intake manifolds, especially on late model cars, where plastic manifolds are commonplace these days. As air filters get dirty through performing the task they are designed for, most LPG systems require regular returning to compensate for the slightly reduced airflow into the engine.