I been around awhile and just found out about the GM Engine Oil Supplement which should be added with each oil change per GM engineers.

Is anyone using this or is this an old school method for the earlier period muscle cars?

 

Never heard of it.

 

I work at a GM dealer, and I have never heard of anything like that.

 

Check and see if there is any GM EOS on the shelves as it was referred by to me. Now I'm curious.

TIA

EDIT

GM E.O.S. Assembly Lubricant 1 #1052367

 

It is used as the assm. lube and in the factory oil fill, should be used in the break-in oil of new/rebuilt engine

 

Ive seen it mentioned in manuals, but I can't imagine what it's going to help. Regular oil changes should be sufficient for most situations.

 

From what I understand it is in all new car engines upon receipt. It seems the GM engineers themselves use it in regular oil change intervals mixing 1 pint to a quart in the last two quarts of oil used as opposed to just entering it from the bottle into valve case. They seem to recommend its use to anyone that inquires about it too for use in subsequent oil changes. What do they know that they're keeping to themselves.

Kinda like GM's version of Marvel Mystery Oil. I just never heard of it after a couple of decades of motoring and hanging in my buddies shops.

Just thought I'd ask here and see if I was the only one in the dark.

Ya learn something new everyday!

 

Ill look around in our parts department, Ill let you know tommrow if I find anything. I doubt we have it though.

 

GM part # 1052367, zinc rich engine break-in oil. Supposedly good for cam wear prevention.

I remember many years ago (1960'-70's) when throwing in a small can of EOS with every oil change was an easy way for the dealer to make an extra $5 on the oil change.

http://www.gmpartsdirect.com/perform...ATID=1251.html

 

I just looked around in parts, and no one has ever heard of this stuff.