ZDDPlus Engine Oil Additive

From $16.99
Part #
As Configured

After 70+ years of trouble-free, metal-metal engine protection, ZDDP (Zinc Dialkyl Dithio Phosphate = Zinc and Phosphorus) is being removed from domestic motor oil by order of the E.P.A., as it degrades catalytic converters. If your engine was designed prior to the 1990s, your non-roller lifters require ZDDP in your motor oil to avoid premature deterioration. Don't let your lifters run metal-to-metal. Add the 4 fluid ounce contents of this ZddPlus bottle at every 4 to 5 quart oil change.

Not for use in cars with catalytic converters!



The Longest in the Business

  • All Classic British products are warrantied to be free from defects in material and workmanship for 2 years from the date of invoice.
  • All superchargers, supercharger components, and supercharger hardware are warranted to be free from defects in material and workmanship for 1 year from date of invoice.
  • Moss Motors, Ltd. will, at its discretion, repair or replace any part that fails in service within the warranty period. This warranty does not cover labor, failure of related components, normal wear of brake or clutch components or failure resulting from alteration, misuse, accidental damage, faulty installation, or faulty repair.
  • Warranty requests should be submitted to our sales department and must be supported by the original Moss Motors purchase invoice and documentation of the failure.