Anyone try this stuff? Its the black molasses they sell in the parts dept.

I'm breaking in a new motor and was thinking about adding a bottle of it to my oil every time I do an oil change and add new oil.

Any idea how well it works?

 

I don't believe in supplements. A good oil is all you should need. MHO.

 

I, too, do not use oil supplements, with ONE exception: GM's EOS, P/N 1052367. I would use it on a new engine build up, but not necessarily after the first oil change, but that's a personal preference.

This has been around for maybe 45 years or more. GM recommends you use it for startup of their crate engines. It's not one of the typical snake oils we see in the media.

If you search the internet you'll find lots of info on it...mostly good.

Here's a GM installation instruction:

http://www.gmgoodwrench.com/resource...Procedures.pdf

My $.02

 

Thanx for the info.

Two local shops recommended we use it for the first 2 oil changes.

 

I noticed those instructions say : So as I see it, the main purpose is to get oil pressure up quickly, not as a general supplement to the oil.

 

We primed his pump for 20 mins before putting the intake on.

I dunno...2 shops said its good for new parts.

 

I suppose loading the oil pump with it might get it to the places it needs to be at oil priming time. I thought I saw a couple of other callouts for it also in the link. Perhaps it was just to sell more of it.

A long while ago, probably before specific "assembly lubes" were marketed, EOS was the asssembly lube of choice for many, even non-GM engine builders. From what I hear, it still may be for some guys. Hey, it's a personal preference. Sorta like bourbon, or women. On second thought, I like all three.

 

1970 Riviera with a 455-4 and 1968 with a 350-2. Recommended back in the good old days and still recommended on new builds and the ole engines.

Do a search on www.v8buick.com for EOS and you'll find some good material on it.

 

I used the GM EOS as the assebmbly lube for my cam change. It worked
just fine. I used about 1/2 the bottle for assembly and 1/2 the bottle to
pre-soak the lifters after washing them with paint thinner to remove the
grease (Comp R's). It seems to stay on the parts pretty well. I changed
the oil after the initial run-in, and then again at 300 miles, but did not
add any more EOS.

 

Obviously, with today's roller cams, it is mute, but years ago, as the supplement of choice, I used EOS, and later, Super EOS, the GM recommended/endorsed/marketed supplement to lube flat tappet cam lobes/lifter surfaces prior to initial startup. Was very popular decades ago. It was almost automatic, put in a new cam, this stuff was used in assembly, and rest poured over/on cam assembly.

If it is desired to immerse lifters in oil, and pump them up, that is one thing, but 'soaking' lifters is pointless. The metal won't absorb anything. As far as the subject matter is concerned, it (EOS) was meant to be used on surfaces that must endure conditions relating to friction. Still, not a bad idea to include it in the initial breakin oil. Although, don't know how it would affect initial ring/wall breakin effort.

 

All though I am far from an expert on this or any other fresh motor question, I do believe Arnie has a good point on how this might effect ring break in.