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Can you use regular gas instead of premium in a Mercedes E350?

It is generally not recommended to use regular gas instead of premium in a Mercedes E350. Here's why:

- The Mercedes E350 is equipped with a turbocharged engine, which requires higher-octane fuel. Regular gas has an octane rating of 87, while premium gas has an octane rating of 91 or higher. Using regular gas in a turbocharged engine can lead to knocking, which is a harmful condition that can damage the engine.

- The E350's engine is also designed to run on premium gas, which has a higher energy density than regular gas. This means that premium gas can provide more power and better performance.

- Using regular gas instead of premium can also affect the fuel economy of the E350. Because regular gas has a lower octane rating, it burns less efficiently in the engine, resulting in lower fuel economy.

While you may be able to use regular gas in your E350 in an emergency, it's not a good idea to make a habit of it. Doing so can damage the engine and reduce the performance and fuel economy of your car.