Sometimes, drivers don't even realize they own a flex-fuel vehicle. If your car has a small label near the yellow gas cap that says E85 or Flex Fuel, then you're in luck. Obviously, these cars look ...

According to AAA, as of July 14, 2025, the average price for a gallon of premium gas, or 91 octane, in California is $4.93. Across the country, that number comes down to $3.98, and drops as low as ...

Every time you gas up, you're faced with the decision. Do you press the "regular" or "premium" button at the pump? Are you ruining your car when you opt to save a few bucks, or are you pouring money ...

Fuel comes in different grades based on octane level at gas stations. Only some performance engines require Premium fuel for the best power output, fuel efficiency, and engine function. Are you ...

The price difference during a fill-up between regular and premium gas can be eye-opening. As of this writing, the U.S. Energy Information Administration reports that the average price for a gallon of ...

Octane fights knock; it doesn’t add power to cars designed for regular. Follow the fuel-door label and pick regular pumps—the detergent is the real upgrade Premium Gas Isn’t Better. It’s Octane vs.