FPPF 90604 LUBRICITY 100% 16 OZ BOTTLE, TREATS 200 GALLONS OF DIESEL FUEL PER BOTTLE

If you have a diesel vehicle, and you want to keep the pump & injectors in perfect condition, this is the only additive that can add back the lubricity removed in low sulfur diesel fuel.

I use this in my LB7 Duramax, with 200k it loves this stuff. Runs smoother at idle and less clatter.