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#3262292 - 01/28/14 06:58 AM Re: Fresh Oil = Stripped AW ??? [Re: edhackett]
Garak Online   content


Registered: 12/05/09
Posts: 11619
Loc: Regina, Saskatchewan, Canada
Originally Posted By: edhackett
There you go, the blip seen in UOAs explained by simple math, no extra wear required.

Did the original research do anything to take into account residual contaminants? Or, has anything been done since?

It's all fine and well to talk about requiring time and heat to activate additives, or AW layers being reduced or not replaced at a good rate, but unless we can quantify that, we have a bit of a problem.
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2008 Infiniti G37 coupe - Mobil Delvac 1 ESP 5w-40, Hastings LF113
1984 F-150 4.9L six - Quaker State GB 10w-30, Wix 51515

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#3262930 - 01/28/14 05:49 PM Re: Fresh Oil = Stripped AW ??? [Re: Phishin]
edhackett Offline


Registered: 06/09/03
Posts: 1544
Loc: Sequim, WA
There was no need to take the residual contaminates into account. They weren't measuring wear in the engine. The cobalt 56 in the lifter used in the bench apparatus was the proxy for wear. Traditional engine wear metals as we know them in UOA were not in the equation at all. The engines were merely a source of used oil.

Ed
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#3263575 - 01/29/14 09:26 AM Re: Fresh Oil = Stripped AW ??? [Re: edhackett]
Garak Online   content


Registered: 12/05/09
Posts: 11619
Loc: Regina, Saskatchewan, Canada
Okay, I get you know. Not having read all the papers in question here makes things a little murky.
_________________________
Plain, simple Garak.

2008 Infiniti G37 coupe - Mobil Delvac 1 ESP 5w-40, Hastings LF113
1984 F-150 4.9L six - Quaker State GB 10w-30, Wix 51515

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#3280177 - 02/12/14 11:51 PM Re: Fresh Oil = Stripped AW ??? [Re: demarpaint]
MrQuackers Offline


Registered: 08/17/12
Posts: 1072
Loc: Oregon
Originally Posted By: demarpaint
I read here a while back that the fresh oil with the fresh add pack does some cleaning of deposits that accumulated during the prior OCI. That cleaning frees up wear metals that might have been trapped in those deposits. That could be the cause for a slight spike in wear metals early on in the OCI. That also made sense to me.


Agreed. I change on the Hank Hill schedule.
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