Description Keep your vehicle running smoothly with the Diesel Kleen Plus Cetane Boost. It cleans dirty injectors and has a Slick diesel lubricator for maximum fuel lubrication. This helps to prolong the lifespan of pumps and injectors from accelerated wear. It is safe for use in all diesel fuels including low-sulfur diesel and biodiesel blends. The 16-oz fuel injector cleaner improves your level of performance while increasing your mileage per gallon by up to eight percent.