A Core deposit is a form of deposit you pay until returning your old part. If you don't have the core at the time of purchase, you must pay the core charge. That charge is refunded to you when you return the core.
Complete Diesel System Cleanup. A concentrated one-tank cleanup that delivers a powerful SHOCK to your dirty fuel system. Made with the maximum available chemistry it's the most powerful diesel fuel system cleaner on the market. Excellent cleanup for the sticky injectors frequently found in modern common rail systems. Proven 100% deposit removal and reduces emissions. Cleans INSIDE the injectors and prevents IDID. Only needed 4x per year. 1 Bottle (15 fl oz) treats 30 Gal of diesel fuel.