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#4500950 - 08/29/17 04:31 AM HTHS of a couple of OTC engine oils
Shannow Offline


Registered: 12/12/02
Posts: 39924
Loc: 'Stralia

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#4501044 - 08/29/17 08:11 AM Re: HTHS of a couple of OTC engine oils [Re: Shannow]
bigj_16 Offline


Registered: 07/03/17
Posts: 1271
Loc: Douglas County, Colorado
Thanx. This paper has some interesting data.

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#4501050 - 08/29/17 08:22 AM Re: HTHS of a couple of OTC engine oils [Re: Shannow]
merconvvv Offline


Registered: 07/10/16
Posts: 682
Loc: il usa
So gm 5w30 has hths of around 3.5 ?
Gm 5w30 and mobil 5w40 have almost similar hths?
Am i reading the chart correctly ?
_________________________
1988 Mazda RX7 na PP 10w30 Noack 4.7
1994 Chrysler Concorde 3.3
1999 Ford Expedition 4.6 QSUD 10W30 NOACK 5.0

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#4501063 - 08/29/17 08:37 AM Re: HTHS of a couple of OTC engine oils [Re: Shannow]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 11970
Loc: N.H, U.S.A.
xxx

Sorry, posted in wrong place somehow and cant delete after 3 mins?!


Edited by ARCOgraphite (08/29/17 08:41 AM)
_________________________
2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter

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#4501163 - 08/29/17 10:20 AM Re: HTHS of a couple of OTC engine oils [Re: Shannow]
69GTX Offline


Registered: 09/23/15
Posts: 3815
Loc: Connecticut
Somewhat confusing to me trying to pull the 5w-30 info out of those charts. I assume they're using Mobil Super Syn. 5w-30. Can we be certain they're using Grp 3+ synthetics for all of the 5w-30's?
_________________________
----------------

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

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#4501195 - 08/29/17 10:59 AM Re: HTHS of a couple of OTC engine oils [Re: 69GTX]
kschachn Offline


Registered: 12/26/05
Posts: 9420
Loc: Upper Midwest
Originally Posted By: 69GTX
Somewhat confusing to me trying to pull the 5w-30 info out of those charts. I assume they're using Mobil Super Syn. 5w-30. Can we be certain they're using Grp 3+ synthetics for all of the 5w-30's?

Why would that matter?
_________________________
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 394K
2000 Toyota ECHO, 267K

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#4501240 - 08/29/17 12:19 PM Re: HTHS of a couple of OTC engine oils [Re: Shannow]
merconvvv Offline


Registered: 07/10/16
Posts: 682
Loc: il usa
What is the weight of shell helix in the figures.
I dont see any weight listing.
_________________________
1988 Mazda RX7 na PP 10w30 Noack 4.7
1994 Chrysler Concorde 3.3
1999 Ford Expedition 4.6 QSUD 10W30 NOACK 5.0

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#4501400 - 08/29/17 02:51 PM Re: HTHS of a couple of OTC engine oils [Re: kschachn]
69GTX Offline


Registered: 09/23/15
Posts: 3815
Loc: Connecticut
Originally Posted By: kschachn
Originally Posted By: 69GTX
Somewhat confusing to me trying to pull the 5w-30 info out of those charts. I assume they're using Mobil Super Syn. 5w-30. Can we be certain they're using Grp 3+ synthetics for all of the 5w-30's?

Why would that matter?


Because the 5w-40 and 5w-50 oils tested are very likely to be synthetics. In the case of Mobil, I don't see them offering a 5w-40 conventional. Wouldn't you want to compare apples to apples (ie synthetics vs synthetics). 5w-30 grade on the surface can be just as easily conv or syn.
_________________________
----------------

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

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#4501403 - 08/29/17 02:57 PM Re: HTHS of a couple of OTC engine oils [Re: 69GTX]
kschachn Offline


Registered: 12/26/05
Posts: 9420
Loc: Upper Midwest
Originally Posted By: 69GTX
Because the 5w-40 and 5w-50 oils tested are very likely to be synthetics. In the case of Mobil, I don't see them offering a 5w-40 conventional. Wouldn't you want to compare apples to apples (ie synthetics vs synthetics). 5w-30 grade on the surface can be just as easily conv or syn.

Not really, the abstract states "The article presents the results of experimental studies of HTHS viscosity of modern motor oils belonging to different viscosity classes" which to me would be agnostic to the base stock composition of the finished oil.
_________________________
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 394K
2000 Toyota ECHO, 267K

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#4501601 - 08/29/17 06:55 PM Re: HTHS of a couple of OTC engine oils [Re: merconvvv]
Shannow Offline


Registered: 12/12/02
Posts: 39924
Loc: 'Stralia
Originally Posted By: merconvvv
So gm 5w30 has hths of around 3.5 ?
Gm 5w30 and mobil 5w40 have almost similar hths?
Am i reading the chart correctly ?


Yep,
it gets back to what I've been saying forever...they knew that when they went to multigrades across the board that the kinematics on J300 stopped accuratelt defining what an oil can do. So they tested and proved that HTHS was the answer, THEN set a bunch of minimums for each grade, and initially gave the 0W, 5W, and 10W40s the same minimum as a 30.

The grading should be xW-HTHS, with the kinematics as the secondary factor.

Per the apparent cofusion on the GM oil...the Delco 5W30 on the shelves locally is Dexos 2, i.e. above 3.5 HTHS.

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#4502019 - 08/30/17 07:20 AM Re: HTHS of a couple of OTC engine oils [Re: Shannow]
merconvvv Offline


Registered: 07/10/16
Posts: 682
Loc: il usa
Originally Posted By: Shannow
Originally Posted By: merconvvv
So gm 5w30 has hths of around 3.5 ?
Gm 5w30 and mobil 5w40 have almost similar hths?
Am i reading the chart correctly ?


Yep,
it gets back to what I've been saying forever...they knew that when they went to multigrades across the board that the kinematics on J300 stopped accuratelt defining what an oil can do. So they tested and proved that HTHS was the answer, THEN set a bunch of minimums for each grade, and initially gave the 0W, 5W, and 10W40s the same minimum as a 30.

The grading should be xW-HTHS, with the kinematics as the secondary factor.

Per the apparent cofusion on the GM oil...the Delco 5W30 on the shelves locally is Dexos 2, i.e. above 3.5 HTHS.


gm ac delco 5w30 is good stuff.

Agreed they should list hths ccs mrv and noack on every can of oil. Not that difficult ! I am going to thicken up my 10w30s with a hint of 20w50 to bring hths around 3.5

enjoy the new property !
_________________________
1988 Mazda RX7 na PP 10w30 Noack 4.7
1994 Chrysler Concorde 3.3
1999 Ford Expedition 4.6 QSUD 10W30 NOACK 5.0

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