Premium vs. Regular Gas: What's the Difference?

2021 Mercedes-Benz E-Class Sedan


What’s the difference between premium and regular gas? Price, engine suitability, and octane are the main factors that set these two types of fuel apart. Learn more about how premium vs. regular gas compare, and see what is needed for your car with the team at the Mercedes-Benz of San Antonio service center today!

Premium Gasoline: What is It?

Premium gas is a higher octane gasoline than regular (usually 90 or above.) It’s also usually more expensive and has additives that help prevent engine knocking or pinging, which can damage an engine if it happens during the combustion process.

Regular Gas: What is it? 

Regular gasoline is less expensive and has fewer additives, but provides enough octane for most cars (usually with an octane level of 87 or above.) You should use premium gas only if your owner’s manual recommends it or you have a high-performance engine that requires premium fuel to run properly.

What’s the Difference Between Premium and Regular Gas?

While the two options may seem similar, there are a few factors that set each apart: 

  • Price: Filling up with premium gas can cost you anywhere between 20 to 40 cents more than using regular gas.
  • Octane Rating: The higher the octane level, the less chance there is of engine knocking (also called pre-ignition) which can damage your vehicle.
  • Engine Suitability: Regular unleaded gas burns faster than premium gas, making it better suited for engines that have low compression ratios. On the other hand, engines with high compression ratios will benefit from premium gasoline. 

What’s the Best Gas for Mercedes-Benz?

For many cars, premium gasoline is not necessary. However, with a precision-tuned Mercedes-Benz, the gas type recommended is premium unleaded fuel. This type of fuel will best work with the performance-focused features of your Mercedes-Benz model. 

Contact Mercedes-Benz of San Antonio To Find Out More About Your Vehicle’s

If you have more questions about premium vs. regular gas, or you’re looking for more car care tips, the Mercedes-Benz of San Antonio service center is here for you! Our knowledgeable team is here to help keep your car running at its best on the streets of Shavano Park and Alamo Heights.

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