ZDDP of Kendall GT-1 | Valvoline VR-1 | Penz GT?

[wowthisexists]

Can someone help me look up and compare the ZDDP content of these oils?
I don't know what to look for or how to read the data.

Kendall GT-1 20W-50
Valvoline VR-1 20W-50
Penzoil GT 25W-50

 

[Bandito440]

Do a google search for:

[oil name] oil analysis site:bobistheoilguy.com

Here is one I did for VR1.

 

[ToadU]

It doesn't matter. Both meet the same specs. Buy whatever is cheapest or your favorite color of container.

 

[aquariuscsm]

Out of the three in your list,I prefer the Pennzoil.