We’ve been reporting for years that there’s zero advantage to using a higher-octane gasoline than your car requires, and that you can also get away with regular gas if your car merely recommends ...

It's always a tough choice when you're running on fumes and the only pump left has regular gas, while your car runs on premium gas. You might also have accidentally picked a different gas choice than ...

The owner’s manual of my car — an Audi A6 — says to use 91-octane fuel. But the pump near me has 87, 89 or 94. Since then, I’ve noticed that a lot of cars require 91-octane. Is this a case of where ...

I have a 2016 Toyota Avalon. The manual says that I should use 89-octane gasoline. I like to buy gas at my local Costco store, where the price is always lower than at the neighboring gas stations.

Want to get into a heated argument? Try explaining to the public why unleaded is a nickel per gallon higher than regular or how regular and premium have changed in the last few years. Then clarify how ...