Nov 24, 2013 · I know the oil companies change their formulations from time to time... What’s the latest news for high ZDDP oils in 2020? Right now my ‘68 Skylark with a rebuilt 462 has Valvoline 10w30 …

May 4, 2004 · The oil manufacturers obviously know of the importance of the ZDDP to older flat tappet engines, as many of them are steering owners of these engines toward their ZDDP formulated diesel …

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 …

May 11, 2007 · It should be able to, it's meant for engines that cost more than your whole vehicle. Commercial-use oils generally don't compromise. What year is your 302? SM rated oils are loaded …

May 31, 2017 · ZDDP is an anti wear additive that IS necessary, in a hypothetical scenaria where the boundary lubrication regime breaks down, ZDDP is the last layer of defence, the Phosphorous in the …

Jun 21, 2017 · Newby here and 1st post. I've been using Shell Rotella T 10w30 in my pre 2000 Cadillac Northstar and 2001 Jeep Wrangler based on info from the Jeep and Cadillac forums on it's higher …

Jun 20, 2022 · I'm running an old flat tappet V8 so obviously I'm looking for a high zinc oil. But the question is, how do I actually find out the ZDDP of an oil? Will any multi purpose oil that's also meant …

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

Oct 22, 2003 · Quote: I'll take SM over SF,SG,SH,SJ any day of the week. Click to expand... Not if you're looking for ZDDP, which has been reduced only to protect catalytic converters, and in the …

Mar 28, 2010 · ZDDP is a molecule in the form of an ester which is composed of Phosphorus, Zinc, and Sulfur atoms. The "Moly" is primarily a Friction Modifier agent in additive packages whereas ZDDP is …