Can You Add Engine Oil When the Car is Hot?

[StevenLynn]

You can add engine oil when the car is hot. Below are the specific functions of engine oil: 1. Shock absorption and cushioning: When the pressure in the engine cylinder rises sharply, it suddenly increases the load on the piston, piston pin, connecting rod, and crankshaft bearings. This load is transmitted and lubricated through the bearings, providing a cushioning effect against impact loads. 2. Rust and corrosion prevention: The lubricating oil adheres to the surface of parts, preventing contact with water, air, acidic substances, and harmful gases. 3. Lubrication and friction reduction: There is rapid relative sliding between the piston and cylinder, as well as between the main shaft and bearing bush. To prevent excessive wear, an oil film of sufficient thickness must be established between the sliding surfaces to separate them and reduce wear. 4. Cooling: Engine oil carries heat back to the oil tank and dissipates it into the air, helping the radiator cool the engine.