Does lower ZDDP protect less or for shorter time?

[4wheeldog]

Originally Posted By: Pontual
ZDDP acts as AW, related with temperature. Threshold efficiency is above 125C and deplets quickly above 240-250C. There was a study on this a while ago. If I find it I'll link on.


I don't think there is much of anything that will protect an engine, in the 240-250C range. 240-250F, sure. At 240C, things have pretty much melted into an unusable pile.

 

[MolaKule]

But we're specifically discussing an engine at operational temperatures cooled by air or water cooling.

 

[BlueOvalFitter]

I found this article on the interweb. Section 1 of the article might answer some Q?'s.

http://zddplus.labecon.com/TechBrief12 - ZDDP and Engine Break-in.pdf