Hot Shot’s Secret Diesel Extreme fuel additive from Lubrication Specialties, Inc. improves combustion and ignition efficiency, enhances fuel economy and maintains fuel in a clean, stabilized condition. With one dose, Diesel Extreme cleans out fuel tanks, lines and injectors, removes moisture, boosts cetane, lubricates the fuel pump and injectors and neutralizes acid. It also restores fuel economy and power. Diesel Extreme containes 4X more cetane booster than leading competitors, according to the company, and the product's deep clean provides six months of protection to keep diesel engines running strong.