While diesel engines operate on a different principle than regular gasoline engines, many of the issues remain the same. Even the highest quality fuels are far from pure. Small mineral deposits left over from processing will gather in the injection system of your engine. Over time, this can cause a buildup that can disrupt the proper flow of fuel and cause performance and efficiency issues. Once the fuel enters the combustion process, the burn is never 100% complete. While most of the left-overs are expelled safely through exhaust, tiny particles can negatively affect the various engine components. The best diesel injector cleaners help to lubricate the fuel to minimize any mineral buildup in the injection system, as well as optimize the combustion process, resulting in a more thorough burn that increases performance, fuel mileage, and reduces the amount of left-over particles. Diesel fuel system cleaners make sure the engine operates smoother and has a longer lifespan as a result.