Quote:
Originally Posted by pdxmotorhead  New motor,,,, Joe Gibbs Break-in oil. your cams will thank you..
High zinc and suphur content. just what the followers/rockers/lifters like.. |
For a M44 and M/S 5X zinc is not needed, it actually harms the cat converter. I have used diesel oil in my S52 but that was to quiet a loud lifter.