Nov 24, 2013 · What’s the latest news for high ZDDP oils in 2020? Right now my ‘68 Skylark with a rebuilt 462 has Valvoline 10w30 conventional oil with a bottle of Lucas TB Zinc Plus added to it.

Dec 13, 2023 · ZDDP has anti-wear (from P via phosphate films), extreme-pressure (from S via FeS2, ZnS formation) and anti-oxidant properties. Lot of ZDDP variants Primary (-CH2-O-P) more thermally …

Aug 7, 2020 · Here's an explanation about using ZDDP in an engine. More is not always better, even when the additive is beneficial.

Nov 22, 2004 · So I have been considering adding some ZDDP to my older vehicles with flat tappets. These are an '87 Buick Grand National (3.8Turbo), 1966 Cadillac Deville (429V8) and 1932 Ford …

Jul 21, 2003 · Best ZDDP additive? I'd say OLOA 269R paired with some Vanlube 7611M, Molyvan 3000, and Molyvan 855 for good anti-wear, extreme pressure, and friction reducer synergy. In other …

Aug 25, 2018 · Basically the ZDDP molecules that are mixed in oil (primary) are large molecules. ZDDP has an interesting property by which with heat and friction new species of ZDDP are formed …

Jan 25, 2007 · Good morning all, I debated where to put this message. I put it here over the small-engine forum as the crux of my question is the history of ZDDP as an oil additive. One of my hobbies …

Jun 19, 2012 · I'm a firm believer in NOT using oil additives (ie. "thickeners") such as Lucas, Motor Honey, etc. but what about additives that either contain ZDP or ZDDP additives? I know that the zinc …

Jun 28, 2017 · Modern oils tend to have better antioxidant packages help the ZDDP last over longer OCIs. Even API SP oils with only 600-800 ppm phosphorus need to pass a valvetrain wear test on a …

Dec 24, 2024 · You don't need high levels of ZDDP for your engine. Flat tappet V8s need it because of the inertia and forces seen in their valvetrains. They have bigger, heavier valves with higher spring …