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#1521524 - 07/05/09 07:49 AM Mobil 1 HM 10W30 lower pour point than HM 5W30?
oilmaven Offline


Registered: 05/25/05
Posts: 728
Loc: Northern Michigan
I am currently running Mobil 1 HM 10W30 in my 2003 PT Cruiser (a little over 90,000 miles now and runs great). I've had great success with this oil and switched from Castrol (German) 0W30 when my stash ran out (ran from about 25,000 miles...great UOA's). Now that Mobil 1 has introduced a HM 5W30 I thought I'd consider switching to it as I assumed it would be a little "thinner" and better for the upcoming winter and it's subzero temperatures here. Just for giggles I thought I'd check out the MSDS stats on the two oils. The HM 5W30 is rated at 78 cST @ 40C and 11.8 cST @ 100C with a pour point of -33F. The HM 10W30 is rated at 62.6 cST @ 40C and 10.1 cST @ 100C with a pour point of -44F. What gives? I'm certainly no expert but it would appear that the HM10W30 is...thinner and has a lower pour point? I can't get the HM5W30 around here but can get the HM10W30 at Wally world in 5 qt. jugs (PT has a 5 qt. sump). At 5,000 miles the dipstick indicates about 1/4 qt. of usage...excellent I'd say considering the miles. This isn't my daily driver anymore and the oil gets changed out twice a year or so. At this point I'm inclined to just stick with the HM10W30 and call it a day. Appreciate any input...
_________________________
2010 Suzuki Kizashi-Pennzoil Platinum Pureplus 5W30
2008 Toyota Prius-Pennzoil Platinum High Mileage 5W30

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#1521554 - 07/05/09 08:20 AM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: oilmaven]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 9705
Loc: N.H, U.S.A.
I would ask Mobil. Just a guess, but the 10w-30 is typ a light duty truck application and may be forumlated with more group iv stock. Seems odd though.
_________________________
2014 Nissan Rogue S CVT, OC#4 13740mi-Castrol Magnetec 5W30+Nissan 15208-9E01A Filter
2015 Forester 6MT 5Door, OC#4 24596mi-PP 0W20+Subaru Filter

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#1521600 - 07/05/09 09:33 AM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: ARCOgraphite]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
Maybe the specs are reversed? A M1 mistake?

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#1521640 - 07/05/09 10:15 AM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: mechtech2]
hooligan24 Offline


Registered: 09/05/07
Posts: 903
Loc: wa state
I think you have your numbers backwards. Or, are you looking at their regular 5w30 and 10w30?(non-HM) I remember their 10w30 being around 10cST while the 5w30 was in the high 11's.

High mileage PDS: http://www.mobil.com/USA-English/Lubes/PDS/NAXXENPVLMOMobil_1_High_Mileage_Oil.asp

I can't find a PSD on their HM 5w30

Typical Properties

SAE Grade 10W-30 / 10W-40

cSt @ 40 C 78.2 / 98.16
cSt @ 100 C 11.79 / 14.71
Viscosity Index, ASTM D 2270 145 / 156


Edited by hooligan24 (07/05/09 10:18 AM)
_________________________
05 Dodge Neon SRT-4 - Mobil 1 SN 0w40
03 Nissan Xterra S/C'ed - Maxlife Blend 10w30
03 Yamaha YZF-R6 - Rotella T6 5w40

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#1521649 - 07/05/09 10:26 AM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: hooligan24]
ekpolk Offline
The Regenerator


Registered: 04/05/04
Posts: 8881
Loc: Pensacola FL
There's probably no mistake there at all. Remember, the SAE "grades" are actually ranges, they do NOT reflect a specific viscosity.

There could be any number of things happening here. I suspect that, for whatever reason (we'll never know for sure), EM has blended the new 5w-30 HM using a fundamentally different mixture of base oils. Keeping in mind that oil makers frequently change their "designs," they might be moving the HM line to a different formulation (oil and adds), and the pre-existing 10w-30 has not yet received the change.

It's also possible that EM realized that if they were going to bring a successful 5w-30 to the HM line, they would have to make that oil especially resistant to burnoff, evaporation, and so forth. If a new 5w-30 hit the market, only to be greeted by a steady stream of complaints about oil disappearing from the crankcase, that could spell doom for the new product.

Of course, all the above is speculation, albeit educated speculation. The point is that what you perceive as an anomaly is probably not an anomaly at all. Don't forget, afterall, that one of the very "thickest" 30m wt oils out there (when hot) is Castrol's legendary GC, which is "legally" a 0w-30!
_________________________
09 Camry Hybrid, Black (M1 5w-20, std flavor).
07 Avalon XLS, Cassis Pearl (GC 0w-30).
04 Prius, Black (GC -- 0w-30).

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#1521684 - 07/05/09 10:51 AM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: ekpolk]
Drew99GT Offline


Registered: 10/11/02
Posts: 21390
Loc: Colorado Springs
I believe we established a while ago that the MSDS for Mobil 1 HM 5w-30 can't be trusted. I'm sure when the data sheet finally comes out, the pour points will be even with the 10w-30.

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#1521685 - 07/05/09 10:51 AM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: ekpolk]
Steve S Offline


Registered: 01/20/03
Posts: 18449
Loc: East of IGO
How is the cold starting with the M1 you are now running ? It gets cold in Michigan . But then cold to me is anything below 50f.
_________________________
Why do people post I want the best for my car,,, When there isn't anything that is the best on the car to begin with.

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#1521690 - 07/05/09 10:56 AM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: Drew99GT]
ekpolk Offline
The Regenerator


Registered: 04/05/04
Posts: 8881
Loc: Pensacola FL
 Originally Posted By: Drew99GT
I believe we established a while ago that the MSDS for Mobil 1 HM 5w-30 can't be trusted. I'm sure when the data sheet finally comes out, the pour points will be even with the 10w-30.


True. It's quite possible however, that they're formulating to a different design. Not saying it's so, just establishing the possibility. It will be interesting to see what's there when EM finally gets around to posting up a PDS.
_________________________
09 Camry Hybrid, Black (M1 5w-20, std flavor).
07 Avalon XLS, Cassis Pearl (GC 0w-30).
04 Prius, Black (GC -- 0w-30).

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#1521708 - 07/05/09 11:12 AM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: ekpolk]
Drew99GT Offline


Registered: 10/11/02
Posts: 21390
Loc: Colorado Springs
The MSDS for the 10w-30 shows a pour point of -44, yet the data sheet shows -65 F!

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#1521711 - 07/05/09 11:14 AM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: Drew99GT]
ekpolk Offline
The Regenerator


Registered: 04/05/04
Posts: 8881
Loc: Pensacola FL
 Originally Posted By: Drew99GT
The MSDS for the 10w-30 shows a pour point of -44, yet the data sheet shows -65 F!


Yep, that's a clear indicator that they don't have their admin act together. Thankfully, where I live, I won't ever get a chance to see which figure is correct. . . ;\)
_________________________
09 Camry Hybrid, Black (M1 5w-20, std flavor).
07 Avalon XLS, Cassis Pearl (GC 0w-30).
04 Prius, Black (GC -- 0w-30).

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#1521729 - 07/05/09 11:40 AM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: Drew99GT]
1999nick Offline


Registered: 01/14/04
Posts: 1087
Loc: Germantown TN 38138
 Originally Posted By: Drew99GT
The MSDS for the 10w-30 shows a pour point of -44, yet the data sheet shows -65 F!



The M1 website that I am looking at says the pour point of the M1 10W30 HM is -54 degrees, and for the 10W40 it is -39 degrees.

My last oil change was the 10W30 version. This oil change has slightly over 7,000 miles on it, and it is about one third quart low. My vehicle is a 2005 Nissan Pathfinder with the 4.0 V-6. I plan on changing it at the one year mark, which will probably be 10,000 miles.

I would like to try the 5W30 version on my next change, as that is the preferred weight in the Pathfinder manual. It is specced for 5W30, 10W30, and 10W40, with 5W30 preferred.

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#1521760 - 07/05/09 12:44 PM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: 1999nick]
Drew99GT Offline


Registered: 10/11/02
Posts: 21390
Loc: Colorado Springs
 Originally Posted By: 1999nick
 Originally Posted By: Drew99GT
The MSDS for the 10w-30 shows a pour point of -44, yet the data sheet shows -65 F!



The M1 website that I am looking at says the pour point of the M1 10W30 HM is -54 degrees, and for the 10W40 it is -39 degrees.



That's -54C, which is -65F.

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#1522074 - 07/05/09 09:02 PM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: Drew99GT]
daman Offline


Registered: 09/23/06
Posts: 10828
Loc: Bad Axe, MI
I ran the 10w30HM all last winter in my '99 Z71 Noooo problemo!!
_________________________
"Always"....Mobil 1

Current fill: AFE 0w30

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#1522094 - 07/05/09 09:14 PM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: daman]
Nederlander75 Offline


Registered: 09/30/07
Posts: 892
Loc: Behind you, move over so I can...
The PDS on the M1 HM10w30 is awesome, Id imagine it would be great in Mich. winter. In the mid 90s during college in WI I ran 10w30 during the winter one year, no issues. The power steering fluid would take up to 10 minutes to become warm enough to say driving was safe though.

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#1522099 - 07/05/09 09:18 PM Re: Mobil 1 HM 10W30 lower pour point than HM 5W30? [Re: Nederlander75]
daman Offline


Registered: 09/23/06
Posts: 10828
Loc: Bad Axe, MI
Doing another winter run right now of it that will put me threw to next spring ,late,thought about changing it out to 5w30HM when it hits the shelves here,we'll see..
_________________________
"Always"....Mobil 1

Current fill: AFE 0w30

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