T R P CleanBlue Diesel Exhaust Fluid (DEF) is a critical component for modern diesel engines equipped with Selective Catalytic Reduction (SCR) systems. This 2.5-gallon (9.46L) container comes with a convenient dispensing nozzle for easy refills. The American Petroleum Institute (API) certified formula contains urea and meets the strict quality standards required for SCR systems. This DEF fluid helps your diesel vehicle maintain optimal performance and comply with emission requirements. The durable container is designed for safe storage and includes clear trilingual usage instructions. Note: This product must be added to the DEF tank only, not the diesel fuel tank. The container should remain in its protective box during storage and handling. Each container provides 2.5 gallons of DEF, perfect for maintaining your diesel vehicle's SCR system.