Description PRODUCT DETAIL:VP DIESEL ALL-IN-ONE is EPA-registered and 100% street legal. It takes away the guesswork of figuring out which additive is the right one for you. Increases diesel stability, cleans fuel system, pumps, and injectors while restoring power. Helps alleviate diesel "knock" by boosting cetane nearly two FULL numbers, keeping engine smooth and quiet. TESTING (ASTM-D2274) show 85% LESS gum and sediment deposits in fuel treated w/ Diesel All-In-One. Received highest grade for corrosion protection (ASTM-D130) & corrosion resistance (NACE Intl. test). DISPERSES water, reduces smoking, cleans sludge deposits, protects against biodiesel components, increases fuel mileage, & includes anti-gel additive to help keep fuel flowing in cold winter months. Choosing the right diesel fuel additive is tough. Low-sulfur diesel is better for the environment, but comes at the cost of lubrication that diesel engines need, which is where an additive can help.