ZDDP Level in API SF oils

[JLR]

Does anyone know the ppm of ZDDP that was in the old API SF oils?

 

[Garak]

Originally Posted By: JLR
Does anyone know the ppm of ZDDP that was in the old API SF oils?


It would depend on the variety and grade, of course.

 

[addyguy]

About 1000-1200.

I'm getting this from oil-analysis reports posted in Popular Science in 1977; I think zinc levels were similar between SE and SF oils, detergency is what increased with the change to SF.

 

[StevieC]

PM Molakule he would know for sure...