DFL is an approved diesel fuel conditioning enhancer with lubricant and conditioner. DFL has been formulated to clean, lubricate, and enhance fuel injector performance.  DFL utilizes a proprietary detergent additive designed to remove traditional and soap-based deposits, which helps restore fuel injector performance. Along with a cetane boost, water protection, cold weather protection, DFL is a diesel fuel injector cleaner with powerful ProMAX lubrication. When used continuously,  DFL prevents new deposit formations, thereby enhancing engine performance and maximizing injector and diesel fuel system life.