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ASTM test / determining miscibility of motor oils #4584136
11/25/17 12:42 AM
11/25/17 12:42 AM
Joined: Apr 2012
Posts: 9,857
Kendall, FL
wemay Offline OP
wemay  Offline OP
Joined: Apr 2012
Posts: 9,857
Kendall, FL





18 Sportage 2.4L AWD: PP 10W30 + WIX 51334XP + e air WIX 10335
13 Santa Fe Sport 2.0T: M1EP 10W30 + OEM + e air WIX 49670

Re: ASTM test / determining miscibility of motor oils [Re: wemay] #4584137
11/25/17 12:55 AM
11/25/17 12:55 AM
Joined: Dec 2002
Posts: 41,585
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 41,585
'Stralia
Thanks for sharing that...

I raised it here
https://bobistheoilguy.com/forums/ubbthreads.php/topics/3503628/Re:_The_oft_quoted_ASTM_D6922

and reference back to it in threads, and get met with "of course" two Sn rated oils mixed meet all the SN standards, there's a "compatibility test".

Just means that they can be mixed, cooled, heated and cooled without splitting or blowing chunks...with the reference oils that is.

Re: ASTM test / determining miscibility of motor oils [Re: wemay] #4584138
11/25/17 01:01 AM
11/25/17 01:01 AM
Joined: Apr 2012
Posts: 9,857
Kendall, FL
wemay Offline OP
wemay  Offline OP
Joined: Apr 2012
Posts: 9,857
Kendall, FL
I know, there's a lot of confusion concerning this. But if you're not a bitoger, this information will never get read. The average joe will only see, "compatible with all other oil", as seen on the labels. But technically, however minute, a risk does exist.


18 Sportage 2.4L AWD: PP 10W30 + WIX 51334XP + e air WIX 10335
13 Santa Fe Sport 2.0T: M1EP 10W30 + OEM + e air WIX 49670

Re: ASTM test / determining miscibility of motor oils [Re: wemay] #4584281
11/25/17 08:05 AM
11/25/17 08:05 AM
Joined: Sep 2015
Posts: 3,953
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,953
Connecticut
6 reference oils are used for mixing with the test specimen. Therefore, how can it be said that the oil being tested can mix safely with all the permutations of different manufacturers? PQIA tests the oils of dozens of producers/blenders. I guess all that can be said is that it passed this particular test with those 6 specific ref oils.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: ASTM test / determining miscibility of motor oils [Re: 69GTX] #4584330
11/25/17 09:26 AM
11/25/17 09:26 AM
Joined: Apr 2012
Posts: 9,857
Kendall, FL
wemay Offline OP
wemay  Offline OP
Joined: Apr 2012
Posts: 9,857
Kendall, FL
Originally Posted By: 69GTX
6 reference oils are used for mixing with the test specimen. Therefore, how can it be said that the oil being tested can mix safely with all the permutations of different manufacturers? PQIA tests the oils of dozens of producers/blenders. I guess all that can be said is that it passed this particular test with those 6 specific ref oils.


Exactly. There would be no way to test the infinate ways different formulations mix.


18 Sportage 2.4L AWD: PP 10W30 + WIX 51334XP + e air WIX 10335
13 Santa Fe Sport 2.0T: M1EP 10W30 + OEM + e air WIX 49670

Re: ASTM test / determining miscibility of motor oils [Re: wemay] #4584454
11/25/17 12:15 PM
11/25/17 12:15 PM
Joined: Dec 2016
Posts: 7,199
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,199
Waco, TX
When it comes to motor oils, miscibility is absolutely the lowest of any of my concerns.

I have yet to hear of any real problems.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: ASTM test / determining miscibility of motor oils [Re: Linctex] #4585139
11/26/17 04:47 AM
11/26/17 04:47 AM
Joined: Dec 2002
Posts: 41,585
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 41,585
'Stralia
Originally Posted By: Linctex
When it comes to motor oils, miscibility is absolutely the lowest of any of my concerns.

I have yet to hear of any real problems.


I've posted before the couple of SAE papers where REAL problems occurred, with PPD and VII interaction causing failures to pump at what people would consider fairly benign temperatures.

Has happened, is fairly rare, and the "W" rating is the most likely thing to be affected. And if you REALLY need that W rating, then you don't want to mix.

Re: ASTM test / determining miscibility of motor oils [Re: Shannow] #4586277
11/27/17 05:20 AM
11/27/17 05:20 AM
Joined: Mar 2015
Posts: 5,433
Virginia
bbhero Offline
bbhero  Offline
Joined: Mar 2015
Posts: 5,433
Virginia
Yeah that is a great point Shannow. If one really needs their 5w to truly be thin enough to pump at -22F then it really matters a whole lot. If one lives in Orlando Florida where it may get down to 32F then it doesn't matter no where near as much.


Nissan Altima 3.5 Coupe
Mobil Super 5w30 Wix 57356
"Treat your family like your friends and treat your friends like your family."
Re: ASTM test / determining miscibility of motor oils [Re: bbhero] #4586887
11/27/17 06:31 PM
11/27/17 06:31 PM
Joined: Dec 2009
Posts: 26,263
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline
Joined: Dec 2009
Posts: 26,263
Regina, Saskatchewan, Canada
Exactly. I already hit that temperature once this fall. In Orlando, not so much. wink


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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