Was this the factory fill?
If there are no babbit bearings, and it appears they are using only roller bearings, the lead must have come from a chemistry component added at the factory, most likely Lead(2+) di(2-naphthoate).
Since there appears only to be spur gears involved, ZDDP levels of 700 ppm are sufficient. No need for EP additives.
The analyzed oil appears to about an 80W90.
Last edited by MolaKule; 09/24/18 08:38 PM.