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Where to Check the Engine Oil Level in an Older BMW 120i?

1 Answers

DelMaria

07/30/25 5:55am

The engine oil level in an older BMW 120i can be checked using the oil dipstick. Below are the specific functions of engine oil: 1. Shock Absorption: 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, cushioning the impact. 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 Wear 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 needs to be established between the two sliding surfaces. A sufficiently thick oil film separates the relatively sliding surfaces, thereby reducing wear. 4. Cooling: Engine oil carries heat back to the oil tank and dissipates it into the air, assisting the radiator in cooling the engine.

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Can Mercedes-Benz customize wheels?

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