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Opti-Lube XPD has become the standard for fuel system protection in common rail VW TDIs. It offers outstanding lubrication, helps burn fuel more completely, and reducing harmful engine deposits and oil contamination. It shows a 42% wear reduction in the ASTM D-5001 Wear test, and can show up to a 5% improvement in fuel economy.

One pack of eight 4 oz. containers. Add 2-3 oz. to each 10 gallons of diesel fuel.

 WARNING California Proposition 65: Cancer and reproductive harm. - More Info...
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Opti-lube produces excellent diesel fuel additives, with different formulations to fit different needs. From their website: "Opti-Lube's main objective with our additives is quality. Everyone has different goals in mind for treating the fuel they put in their vehicle, so our products try to work with every goal and climate to produce positive experiences for our clients. All of our products are safe to use with DPF equipped engines."

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