Thread: What should I use for oil in 40 Ford flathead?
View Single Post
Old 06-29-2013, 08:49 PM   #10
Jay in Mass
Senior Member
 
Join Date: May 2010
Location: Mass.
Posts: 379
Default Re: What should I use for oil in 40 Ford flathead?
Quote:
Originally Posted by dp1743 View Post
I'm new to this forum, so, please bear with me if I happen to step out of protocol. Rotella states it meets API Service CJ-4/SM (whatever that means),
Welcome to the Barn. Whatever the question is, there are thousands of Flathead persons here who have "been there and done that". So don't be afraid to "ask", and enjoy the forum.

I happen to be using the Rotella in my Flatheads also. Would someone please us what CJ-4/SM means?

Would that be the zinc designation?
Thaks Jay in Mass
Last edited by Jay in Mass; 06-30-2013 at 05:26 AM.
Jay in Mass is offline   Reply With Quote