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The 2011 Mercedes E350 bluetec requires SAE 5W-30 oil, and Mercedes suggests using synthetic oil during oil changes. There are two main types of oil available: synthetic, which offers better wear protection and longevity compared to conventional oil. Synthetic oil generally only needs to be changed every 7,500 miles, whereas conventional oil typically requires changes between 3,500 to 5,000 miles. To maintain your car's engine health, it's a good idea to check the oil monthly for any debris or damage, ensuring it is at the correct level as a low oil level could indicate a leak.
The recommended oil for a 2011 Mercedes E350 BlueTEC is 5W-30.
In the southern United States, we rely on 5w-40 oil all year long.