ZDDP contains zinc and phosphorus.
AND ...... briefly - Delo and Rotella no longer contains , at least in sufficient amounts for our classic car engines. Same for Delvac. I used these motor oils for many years - until the mfgs. had to cut out the zinc/phosphorus.
The only oils I've found that contained sufficient amounts of zinc/phosphorus were Valvoline 20W50 VR1 and Kendall 20W50 GT1 racing oils. I believe Brad Penn Racing Oil is relabeled Kendall GT1 Racing Oil.
These products are still available to the consumer onky because they are labeled (to the effect of) "NOT STREET LEGAL."
On Oct 12, 2018, "John Grady jkg@xxxxxxxxxxxxxxxxx [Chrysler300]" <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
I may be wrong but ZDDP is not a “zinc additive” whatever that is ; I believe it contains the phosphorus. , maybe more . We do not want to inadvertently add confusion to this . That said valvoline racing is a good answer . Sent from my iPhone
PLEASE do not depend on zinc ADDITIVES to keep your engine alive. Zinc requires phosphorous molecules, split at the early stage of manufacture, in order to integrate in to the oil solution. It was the phosphorous that was "outlawed", not the zinc, in oil. (Catalytic converters) Without phosphorous, there can be no zinc. Aftermarket Zinc ADDITIVES will not integrate and will lie in the bottom of your oil pan and possibly plug the pick-up and galleys. To be safe, use oil like the Valvoline Racing Oil or similar products that are manufactured with zinc. The "Gov't" allows exemptions for limited use performance oils such as these. Pay the extra $ . This is my $.02
worth. Take it or leave it; don't want to debate it ! Happy Motoring
JM
On October 11, 2018 at 6:35 PM "'Michael Ashmore' michael.ashmore@xxxxxxx [Chrysler300]" <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
Noel, Interesting information. My mechanic just told me to run 15-40 Dello or Rotello diesel motor oil in my 300G. Also he said todays motor oil doesn't have zinc to lubricate the cam and lifters because todays engines are all roller type rockers. Also he said to add a zinc additive (ZDDP) at every oil change otherwise your cam will be worn down in no time. Lessons learned! Mike 300G. ----- Original Message ----- Sent: Thursday, October 11, 2018 9:55 AM Subject: [Chrysler300] Addidtives question -
Several years ago, while at a mini Club gathering at George Riehl's, George had a fellow there who was hawking some products. George highly recommended these. They've been sitting collecting dust, and I'm apprehensive about using them They're made by Hapco Products out of Fraser, Michigan.-
- Slip Coat dripless seal additive. Says it "Increases gas mileage 10% to 20%, Clings to lifters and cam, Prevents dry start-ups, Increases oil pressure and engine life, extreme pressure and anti-wear formula."
- SealLube seal expander - Says it "Positively stops rubber seal leaks in any fluid system, Power steering seals, Rack & pinion seals, Transmission seals, Crankshaft main seals, Any fluid system."
I'm going to toss these unless I hear otherwise, that these are really great to use in my 300.
Thanks,
Noel
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Posted by: Michael Reed <rmreed@xxxxxxxxx>
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