What Causes Engine Oil Leakage in Cars?

[ErinDella]

Engine oil leakage in cars is primarily caused by the failure of rubber seals in the engine. The functions of engine oil include: 1. Lubrication to reduce wear - between the engine's pistons and cylinders, as well as the main shaft and bearing shells, relative sliding causes wear. Engine oil forms a thick oil film between these sliding surfaces, separating the parts and reducing wear. 2. Cooling - engine oil carries heat back to the oil tank and dissipates it into the air, assisting the radiator in cooling the engine. 3. Cleaning - engine oil circulates carbon deposits, sludge, and worn metal particles from engine components back to the oil tank, flushing away contaminants through the flow of lubricating oil. 4. Shock absorption - when pressure in the engine cylinder rises sharply, suddenly increasing the load on pistons, piston rings, connecting rods, and crankshaft bearings, the load is transmitted through the bearings' lubrication, cushioning the impact load.