Accumulation of harmful white crystalline deposits within the Selective Catalytic Reduction (SCR) Diesel Exhaust Fluid (DEF) system can lead to expensive repairs. It is important to take all possible measures to prevent their formation. Beyond the financial burden, these deposits can reduce engine performance, increase fuel consumption, and potentially render the vehicle or machinery inoperative. Measure required amount per dosage chart below and pour directly into DEF drum, tote, pail, cube, or tank: 0.6 ounce per gallon; 1.5 ounces per 2.5 gallons (cube); 3 ounces per 5 gallons (pail); 1 bottle for 55 gallons (drum); 6 bottles for 275-330 gallons (ibc/tote)