2013年11月24日 · 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 10W-30 conventional oil with a bottle of Lucas TB Zinc Plus added to it. I only have about 700 miles on the car...

2004年11月22日 · 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 street rod with a '57 Thunderbird 312V8. Any recommendations on brands or would a better idea be just run something...

2004年5月4日 · 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 oil line, showing they acknowledge the possible need for higher levels of ZDDP in these engines.

2018年8月30日 · 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 (secondary). These are what adhere to metal surfaces and provide boundary layer protection. That’s the short version. MolaKule or one of …

2014年10月8日 · I've also read that Valvoline reduced the ZDDP in VR1 is this true does anyone know the amount of ZDDP in VR1 10w30 ? I'm having a hard time finding this information and want to used the a off the shelf oil with the most ZDDP that I can find.

2017年6月10日 · 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 ZDDP reacts to heat in areas of very high friction such as the valvetrain ( on old flat tappet sliding follower engines it is even more critical ).

2020年8月7日 · Here's an explanation about using ZDDP in an engine. More is not always better, even when the additive is beneficial.

2005年10月19日 · Fine for what? And 15w-40 Delo LE IS the low ash formulation. BFD on the ZDDP reduction, %0.148 versus %0.13, considering the other improvements made.

2022年1月27日 · I know higher ZDDP is needed for flat tappet cams especially those that are performance driven. However, is ZDDP say around the 1200 to 1300 PPM needed for push rod engines in general as more friction exist vs having an over head cam design?

2022年6月20日 · 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 for diesels work? I'm looking at 10w40. Can I just use a …