RBP's Regular Additive is a total fuel system cleaner and lubricity enhancer that totally disperses water for all types of diesel engines. One 16 ounce bottle treats 500 gallons. 1 ounce treats 32 gallons of fuel. Ultra concentrated formula. 1 bottle lasts an average of 16 tanks of fuel. Leading competitors average 1 ounce of additive per five gallons of fuel. Improves the performance, fuel efficiency and longevity of diesel engines while reducing deposits, black smoke and emissions. Improves fuel economy by cleaning dirty injectors and allowing proper fuel atomization, keeping the injectors lubricated so they last longer and operate more efficiently. Compensates for the variances in quality of different fuels and the deficiencies of today's Ultra Low Sulfur Diesel fuel (ULSD) for better engine operation. Increases mileage by approximately 10 percentage. Restores horsepower by cleaning and improving the efficiency of injectors. Recommended for vehicles with frequent periods of inactivity, above ground or under ground fuel tanks, and all types of biodiesel. Designed for use in heavy-duty diesel engines.