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 ...

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 ...

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 ...

Today’s gas-saving moment comes courtesy of Cars.com senior editor Joe Wiesenfelder, who has an interesting idea about octane ratings. We mentioned before that unless your car “requires” a higher ...