Doc’s Diesel DEF System Kit: Protect your SCR system and keep your truck running smoothly with the Doc’s Diesel DEF Treatment Kit, the perfect combination for maintaining a clean, efficient DEF system. This kit pairs high-purity DEF Fluid with our DEF Guard Additive to deliver maximum protection and performance. The DEF Guard Additive helps prevent DEF crystallization that can clog the DEF filter, trigger fault codes, and lead to costly derates. By stopping buildup before it starts, the kit ensures cleaner operation, fewer repairs, and more time on the road. Product Details: Includes 1 DEF Diesel Exhaust Fluid (2.5 Gallons) and 1 DEF Guard Diesel Exhaust Fuel Additive (8oz) Doc’s DEF Diesel Exhaust Fluid Doc’s DEF Guard Diesel Exhaust Fluid Additive Doc's Part Number: DEFGUARD8OZ+DDEF2.5G
