THIS PRODUCT IS NOT A FIX-ALL FOR FUEL INJECTORS. REV-X WILL HELP MAINTAIN YOUR HUEI FUEL INJECTION SYSTEM & IN MOST CASES CAN CURE MISSING INJECTORS DUE TO STICTION. Rev x engine oil treatment (4) 4 oz for powerstroke cummins duramax turbo diesel add our store to your favorites to receive newsletters about new items & special promotions!