Item #50332 Z

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If your project vehicle is pre-1989, ZDDP Plus Oil Additive is a must for keeping that engine running smoothly If your engine was designed before 1989, the camshaft's non-roller lifters require ZDDP in the motor oil to prevent premature deterioration. However, the U.S. government ruled that ZDDP could no longer be put into domestic motor oils starting in 1989, so today's motor oils won't provide the ZDDP your older engine needs...unless you add this ZDDP Plus Oil Additive!

ZDDP alters bearing and journal surface characteristics to prevent metal-on-metal contact
ZDDP reduces the tendency of parts to scuff or gall under heavy loads
Add a 4-oz. bottle of ZDDP Plus to every 4- or 5-quart oil change
Individual 4-oz. bottle

"ZDDPlus" is the best insurance to protect your classic or high-performance flat-tappet engine!" says NHRA's #1 Drag Racer of all time, "Big Daddy" Don Garlits.

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About ZDDP Plus Oil Additive 4 fl. oz

After 70+ years, the EPA mandated that all domestic motor oil producers remove ZDDP (Zinc Dialkyl Dithio Phosphate) from all conventional and synthetic motor oil. If your engine was designed before 1989, the non-roller lifters still require ZDDP to avoid premature deterioration. Our ZDDP Plus Oil Additive puts back what your pre-1989 engine needs!

One 4-oz. bottle of ZDDP Plus Oil Additive

Click Here for Material Safety Data Sheet

(Q) Can ZDDP Plus Oil Additive be used in both conventional and synthetic oils?
(A) Yes.

(Q) Will too much hurt the motor?
(A) No, but do not exceed 8 ozs. (2 bottles).

(Q) Can I use it in any motor?
(A) No, only 1989 and older.

(Q) Will it work in diesel?
(A) No, it will have no effect on a diesel motor.

Always wear eye and skin protection when changing oils or working around petroleum products.

Customer Reviews

Awesome stuff (Posted on 8/5/11) Review by Baal

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I started using it in my motorcycles and have immediately noticed smoother shifting and idle. Smoother running at all rpms.

The EPA is out to KILL older engines all for their almighty catalytic convetors.

Screw the Feds, Im protecting my rolling stock!

Guess it really works (Posted on 5/22/10) Review by Birdman

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Just finished a big block Mopar for a guy. Has a "flat tappet" cam. busted that baby off with good old Penn 30w in it along with the ZDDP. Ran the cam in without any issues at all. Good oil pressure, right on temp, and no noises other than the VVVRRROOOOOOOMMM you expect from a well built Big Block Mopar.

Use it. It works

Great Product! (Posted on 1/12/10) Review by Neil

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With the higher working tappet pressures of high compression '60s - '70s engines and cam profiles on non-roller cams and the Feds removing or radically reducing this from all modern oil due to CAT and EPA/CAFE concerns I have wipped out more then one cam due to this problem. Even Rotilla has dropped levels of Zinc Disolphate to marginal levels at best. Add a bottle of this to your oil change and rest assured it will have enough ZDP to eliminate cam and lifter scuffing. Great product, thanks for offering it!