A clean engine runs better
There are valid reasons to keep an engine clean. If you’re driving an older ride that has developed a few minor oil leaks over the years (but still keeps on ticking) getting that grime off can help save repair costs and breakdowns. There are a lot of rubber components under the hood such as vacuum and coolant hoses, drive belts, bushings and such that can have their lifespan greatly reduced by contact with oil or fuel. If your chariot has a persistent leak of any fluid, getting it fixed is a wise idea. Not only is it easier on the environment, it can save you larger repair bills and the inconvenience of a possible road-side failure.
Removing dry debris such as grit, gravel, twigs, and leaves can also help improve your vehicle’s operation.