08-20-2007, 07:06 AM
|
 |
Renegade Nuns on Wheels
|
|
|
Join Date: Aug 2001
Location: columbus,
Oh
Cobra Make, Engine: Unique 427 roadster with 351C-4B
Posts: 5,129
|
|
Not Ranked
The new formulation of Rotella T 15W-40 that meets the CJ-4 spec contains 1210 ppm zinc, the max allowed for CJ-4. If I recall correctly, it used to be about 1400. 1210 is plenty.
http://www.machinerylubrication.com/...up=Lubrication
It is my understanding the companies like Crane and Comp Cams have changed hardening processes in respoonse to lower phospated ash/zddp. |
Threaded Mode
