Premium and Regular Gasoline: What’s the Difference?


If you’re the owner or prospective owner of a Mercedes-Benz vehicle, such as the 2018 Mercedes-Benz CLA 250, you’ve probably wondered if it needs to be filled up with premium gasoline. After all, Mercedes-Benz vehicles are luxurious and high-end, and it would only be fitting that they need to be filled up with the best type of fuel. Here at Mercedes-Benz of Annapolis, this is a question that we get a lot, and our expert mechanics are here to help explain the differences between the different types of gasoline.

The difference in the three types of gasoline available -- regular, mid-grade, and premium -- has to do with their octane level (87 for regular, 89 for mid-grade, and 91 to 93 for premium). The octane rating of gasoline is a measure of how likely it is for engine combustion to occur at the wrong time. The higher the octane level, the less likely it is for this mistimed explosion to occur. A few of these explosions, known as engine knocks, occurring isn’t going to hurt your engine, but if they happen repeatedly, long-term damage could occur.

Higher-end engines, such as those found under the hood of Mercedes-Benz vehicles, sometimes require high-octane premium fuel because of their increased levels of output. In order to find out what kind of fuel your vehicle requires, simply check in the instruction manual or inside the gas cap. Some new Mercedes-Benz cars will only recommend premium fuel, which means that you can safely use a lower grade. But if your car requires premium fuel, then filling up with a lower grade could hurt performance and fuel economy.

If you have any questions about types of gasoline, or want to test drive a new Mercedes-Benz car near Annapolis, MD, head on over to Mercedes-Benz of Annapolis.  

Categories: Parts, Service

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