Even if you are careful about using the recommended and high-quality fuel for your engine, contaminants can still make their way into your fuel system from the gas station’s underground tanks.

HOT ROD Top Pick: Berryman Intake Valve & Combustion Chamber Cleaner and B-12 Chemtool Total Fuel System Clean-Up We explain why all gasoline engines, especially direct-injected engines, benefit ...

Fuel injector cleaners claim to help your engine run smoother and more efficiently. We've put together a list of some of the top over-the-counter EFI cleaners you can buy.

Modern engines are more advanced and more demanding, which is why fuel chemistry is a critical factor when it comes to ...

Fuel system cleaners are cheap and plentiful at automotive stores, but do they actually do all the things that they claim? We took a look to find out.

From the experience of mechanic Russ Good, these four fuel injector cleaners are some of the best money can buy in 2025.

Going DEF Diesel engines traditionally have been known for being fairly “green” in that they burn clean and use diesel fuel pretty efficiently compared to a regular combustion engine.