What type of engine oil should be used for the 2021 Mercedes-Benz C260L?
2 Answers
2021 Mercedes-Benz C260L requires fully synthetic engine oil. The advantages of fully synthetic engine oil are introduced as follows: Low evaporation loss of fully synthetic engine oil: Fully synthetic oil is a pure compound with a narrow boiling point range, and its evaporation loss is much lower than that of mineral oil, which can reduce fuel consumption, reduce exhaust emissions, and extend the service life of the catalytic converter. In addition, compared with traditional mineral oil, synthetic engine oil also has excellent chemical stability, good radiation resistance, high oil film strength, and low foaming characteristics. Therefore, high-end cars generally choose synthetic engine oil. Strong high-temperature oxidation resistance of fully synthetic engine oil: The thermal oxidation stability of fully synthetic oil is much better than that of mineral oil, meaning it has a lower tendency to produce acidic substances and sludge due to oxidation. Under various harsh operating conditions, it can provide appropriate lubrication and effective protection for the engine, thus having a longer service life and ensuring the stability of the oil's performance over long-term use. In the same working environment, synthetic oil has a much longer service life than mineral oil, so although the cost is higher, when comparing the number of oil changes, it is not much higher than mineral oil.
I've studied the maintenance manual for the Mercedes-Benz, and the 2021 C260L officially recommends 0W-30 engine oil with MB 229.51 or 229.52 certification. This low-ash formulation is specifically designed for its turbocharged engine and particulate filter. At the dealership, I noticed they often use genuine Mercedes-Benz oil, but when changing the oil myself, I found that premium brands like Mobil 1 with the same specifications also perform well. In high-temperature summer regions, a 5W-40 viscosity oil can be used, but in northern areas, it's best to stick with the 0W series to prevent cold-start wear. The key is not to skimp and use regular oil, as engine warning lights coming on could lead to expensive repairs. Changing the oil every 7,500 kilometers is a safe bet, and it's also a good opportunity to check the oil level to avoid oil consumption issues.
