CARS.COM — A clean engine compartment makes a used car look newer and better maintained. Some shops that perform engine cleaning services claim a clean engine even runs a little cooler because ...

We may receive a commission on purchases made from links. The engine bay under the hood is one of the dirtiest parts of a daily-driven car. But it's also one of the most neglected places to clean.

So your daily driver hot rod has an engine that runs good but looks like a horror-film reject. What do you do? Well, you could bolt the hood shut and drive the beast until it dies, or you could spend ...

To save time and money, you might want to learn how to clean fuel injectors without needing to rely on professionals. But do ...