Just like your heart pumps your blood throughout your body called the circulatory system, the oil pump of a  gasoline or diesel automobile does the same throughout its engine.In cold weather climates, at times it is necessary to warm-up an engine but here in the Philippines there’s NO such a thing. When a car is parked and the engine turned off, all of its oil drains down to its oil pan. Starting and immediately revving an engine before the oil pump has a chance to circulate the oil throughout its engine can blow-up the engine or at least do internal damage, especially a diesel?