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#4615917 - 12/27/17 03:10 PM ASTM D97 - Pour Point
Shannow Online   content


Registered: 12/12/02
Posts: 40173
Loc: 'Stralia
Not criticism of the DIY testing going on, but explaining why I did the cylindrical cylinder "knockover" tests, and a bit on pour point.

Here's a video of the actual pour Point test type procedure.



Note that it's a relatively "gentle" test, and the pour point is at the point that it stops moving for 5 seconds, plus 3C...(note, you can see why it doesn't really tell you about lubrication).

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#4615926 - 12/27/17 03:21 PM Re: ASTM D97 - Pour Point [Re: Shannow]
Linctex Offline


Registered: 12/31/16
Posts: 6186
Loc: Waco, TX
Originally Posted By: Shannow
(note, you can see why it doesn't really tell you about lubrication).


Just its ability to be pumped?
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4615931 - 12/27/17 03:25 PM Re: ASTM D97 - Pour Point [Re: Linctex]
CT8 Offline


Registered: 10/09/14
Posts: 11230
Loc: Idaho
Originally Posted By: Linctex
Originally Posted By: Shannow
(note, you can see why it doesn't really tell you about lubrication).


Just its ability to be pumped?
From the sump to the top of the engine!
_________________________
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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#4615934 - 12/27/17 03:28 PM Re: ASTM D97 - Pour Point [Re: Linctex]
Shannow Online   content


Registered: 12/12/02
Posts: 40173
Loc: 'Stralia
Originally Posted By: Linctex
Originally Posted By: Shannow
(note, you can see why it doesn't really tell you about lubrication).


Just its ability to be pumped?


Nope, the MRV does that...the MRV is the ability for the oil to
a) fall into the pick-up tube without forming a "step" (yield point)
b) get sucked up the pump intake.

They used pour point for a long time, but found it to be generally useless at preventing failures under specific cooling rates.

Look at the data sheets for some W synthetics and they have amazing pour points, but still only meet 5W ... that's why.

It's why all those 5W at -40C pour tests tell a story, but not what happens in your engine.

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#4615944 - 12/27/17 03:41 PM Re: ASTM D97 - Pour Point [Re: Linctex]
Garak Offline


Registered: 12/05/09
Posts: 24733
Loc: Regina, Saskatchewan, Canada
Originally Posted By: Linctex
Originally Posted By: Shannow
(note, you can see why it doesn't really tell you about lubrication).


Just its ability to be pumped?

I would say that pour point only tells you, and then only indirectly and not terribly reliably, something about the base stocks of the oil. In that vein, and also with respect to pumpability, Royal Purple's CI-4+ 15w-40 had a pour point of something like -45 C. Obviously, given that it's a 15w-XX, it's not going to pump properly at all at -45 C. But, that was likely a primarily PAO base stock.
_________________________
Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, NAPA Gold 7356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515

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