Motorkote MK-50121-06-6PK Diesel Cetane Boost, 64-Ounce, 6-Pack Directions: Add 1 ounce per 5 gallon of fuel for up to a 7 point increase Directions: Add 1 ounce per 10 gallon of fuel for up to a 3 point increase Effective in all diesel fuels including: Ultra low sulfur diesel fuels, bio diesels and bio diesel blends Removes harmful deposits and prevents breakdown of fuel Cleans dirty injectors