Although most cars use regular gasoline, some manufacturers recommend premium gas in their vehicles. Premium gasoline is also more expensive, which leads many drivers to wonder whether the added expense is necessary. Understanding the difference between regular and premium gas will affect your car’s performance and future auto maintenance needs.

What’s the Difference Between Regular & Premium Gas?

Both regular and premium gasoline are made from crude oil, and the difference is their octane rating. Standard gasoline may have an octane rating of 85 or 87, while premium gasoline will typically have a rating of 90 or above.

The gasoline’s octane rating refers to its ability to prevent pre-ignition, which occurs when gasoline and air ignite in the car’s combustion system before they’re supposed to. The higher the octane rating, the less likely pre-ignition is to occur. Specialty additives and detergents are also added to premium gasoline to reduce emissions.

Why Is Premium Gas Needed for Some Vehicles?

Luxury vehicle brands typically require premium gasoline. This ensures that the engine’s firing sequence occurs properly so that drivers can enjoy fast, smooth acceleration. Despite these benefits, cars that only require regular gas won’t experience a significant performance boost by switching to premium. Using regular gasoline in a vehicle that requires premium could cause severe auto maintenance issues, such as engine knocking and damage to the pistons as well as reduced fuel efficiency and performance.

If your vehicle is experiencing auto maintenance issues due to gasoline quality, contact the team of mechanics at Sumida’s Auto Repair in Honolulu, HI. For over 15 years, this auto repair shop has provided Oahu drivers with a variety of auto maintenance services, including fixing engine oil leaks and repairing brakes. They employ ASE-certified technicians and have a factory-trained Mercedes® Master Technician to keep your luxury vehicle in top shape. View their services online, or call (808) 533-2994 to schedule an appointment.