[lucky3]

I'm breaking in my motor with a new cam and i'm wondering if i should just dump the whole bottle of EOS in with the oil? I'm using moly lube on the cam and lifters.

thanks,

 

[BillsCamino]

Yes, add the EOS to the oil and prime the system before firing it up.

 

[Big O Dave]

I second that!

 

[Schurkey]

The downside is that EOS is not the same as it once was. I believe that GM removed the zinc high-pressure anti-wear additive. So...I suspect the jury is out in regards to it's current ability to do the job.

 

[Guest]

I think STP Oil Treatment has up to 5 percent Zinc in it...

NOT the STP Motor Honey type stuff.

pdq67

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[Wolfplace]

Originally posted by Schurkey:
The downside is that EOS is not the same as it once was. I believe that GM removed the zinc high-pressure anti-wear additive. So...I suspect the jury is out in regards to it's current ability to do the job.

Where did you hear that??
It has been lowered or removed in a lot of "starburst" "for gasoline engine only" oils but as far as I know EOS is still the same great product although a lot of dealers are reluctant to carry or sell it in CA.
The Crane Cam break in lube also is excellent & has the hi pressure additives in it but I still buy EOS by the case for flat tappet stuff.

 

[Gokou]

AFAIK (and as far as the guys at my local dealer know) it's still the same great stuff. However, they are just not supposed to sell it over the counter here in CA. My tag was written up as "gear oil."

Troy

 

[10secBu]

Is there any benefit to add EOS to a solid roller motor? specifially, any benefit to the bottom end? Or is it specifically used to help with flat tappet cam break in?

 

[Wolfplace]

Originally posted by 10secBu:
Is there any benefit to add EOS to a solid roller motor? specifially, any benefit to the bottom end? Or is it specifically used to help with flat tappet cam break in?

I don't really feel there is. Good oil seems to be all bearings & such really need.

 

[cromedss]

I used to work for Chevrolet and the mechanics used to talk about the BG rep stopping in with a 350 engine in the back of a truck. He would pour in the EOS, run the engine for a few minutes and then drain all the oil and run the engine for another couple of minutes dry. Then drop the pan and pull a main and rod cap and it was still mint. I never witnessed this myself but all of them used it in their cars.

 

[Guest]

I just posted this in the loooong Oil Additive thread..

"FWIW, I brought this home from work today from my "Useful Tips" folder.

Zinc dialkyldithiophosphate containing extreme pressure lube additives are;

1. Mechanics Brand Engine Tune Up.

2. K-Mart Super Oil Treatment, and

3. STP Engine treatment with XEP2."

pdq67

Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

 

[77 cruiser]

Do they all contain the same % or are they diff.? What about EOS how much does that have?

 

[Schurkey]

I went to the local Chevy dealer and bought a bottle of EOS. The ingredient list is "petroleum oil". I then made the parts guy give me a Material Safety Data Sheet for it.

EOS DOES contain Zinc Dialkyldithiophosphate: it is listed as "zinc salts". That, along with phosphorodithioic acid, 0,0-di-C1-14-alkyl esters, makes up <5% by weight of the total product.

What does all that mean? I'm not a chemist, so all those multi-syllable words are beyond me, but I do know that my first post was in error. The MSDS I have is dated Sept. 99, and last updated in '96. So, as long as this MSDS isn't outdated, EOS is unchanged since '96.

Any business that uses EOS is required by law to have a copy of the MSDS for use (viewing) by employees, so I can't imagine there'd be any copyright problems with posting it. It should be a public document. I'll scan it if someone would want to host it for public viewing.