If someone can afford buying an expensive car then it also seems logical that such a person should be able to afford buying high quality fuel, which is a particularly important matter for anybody who has a diesel. People having a car with this sort of engine are perfectly aware of the fact how important it is to care for the proper condition of the pump. In order to ensure smooth operation of the whole fuel system it is essential to avoid any dirt and also low quality fuels or adding heating oil to the fuel.