Fuel injector cleaners remove dirt and residue to improve engine performance and efficiency. Learn how they work and choose the best one for your car.

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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.

Is fuel-system cleaner something you should incorporate into your vehicle-maintenance schedule? We answer this question and many more.

STP suggests the addition of its fuel injector cleaner or diesel injector cleaner to a tankful of fuel every 3,000 miles.

While fuel-injector cleaning is often recommended by shops and dealer service centers, it probably isn’t necessary unless it’s correcting a running problem.