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Are today's full syn HM oils thicker than non-HM? #4776135
06/03/18 08:21 AM
06/03/18 08:21 AM
Joined: Sep 2013
Posts: 588
Connecticut
cheesepuffs Offline OP
cheesepuffs  Offline OP
Joined: Sep 2013
Posts: 588
Connecticut
I remember a few years ago before Maxlife blend became resource conserving, people liked that it was on the thick side for its grade. It was commonly known that high mileage oils ran a bit thick. Now with Platinum HM, Maxlife Syn HM, etc, are these modern synthetic HM oils still thicker than their regular synthetic counterparts? Or is that a thing of the past.


2008 Honda Accord Coupe V6
Re: Are today's full syn HM oils thicker than non-HM? [Re: cheesepuffs] #4776200
06/03/18 09:50 AM
06/03/18 09:50 AM
Joined: Mar 2010
Posts: 654
NY
mx5miata Offline
mx5miata  Offline
Joined: Mar 2010
Posts: 654
NY
I never heard of high mileage oil being thicker just additives like seal conditioner. if the oil is 5w30 its a 5w30 high mileage or non. of what I know anyway.


NAPA FULL SYNTHETIC 0w20 Partsplus oil filter
Wix air filter
Re: Are today's full syn HM oils thicker than non-HM? [Re: cheesepuffs] #4776220
06/03/18 10:14 AM
06/03/18 10:14 AM
Joined: May 2018
Posts: 563
South Carolina
ka9mnx Offline
ka9mnx  Offline
Joined: May 2018
Posts: 563
South Carolina
Some are, yes. I'm only familiar with Mobil1 products.

Mobil1 5w-30 has an HTHS of 3.1 and Mobil1 HM 5w-30 is 3.1 so they are basically the same

Mobil1 10w-30 has an HTHS of 3.0 and Mobil1 HM 10w-30 is 3.5 so the HM is thicker.

I could be wrong but I believe HTHS is what defines a "thicker/thinner" oil. With than thinking Mobil1 10w-30 is thinner than 5w-30 at operating temps.

So it's not an easy blanket answer. You have to check the spec's.

On the other hand, The 5w-30 [email protected] is 11.0 and the HM is 12.1 which would make the HM thicker at op temps.

Someone help me out here!


2005 Ranger 3.0 - M1 HM 5w-30/Motorcraft - (85+K)
2000 4Runner 3.4 - M1 HM 10w-30/Toyota - (250+K)
1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar - (175+K)
1993 F150 4.9 - M1 HM 10w-30/Motorcraft - (250+K)
Re: Are today's full syn HM oils thicker than non-HM? [Re: cheesepuffs] #4776222
06/03/18 10:15 AM
06/03/18 10:15 AM
Joined: Mar 2017
Posts: 709
West Ma.
rollinpete Offline
rollinpete  Offline
Joined: Mar 2017
Posts: 709
West Ma.
Two that I know of with a higher viscosity are Mobil 1 syn. hm 5w30 and 10w30,
there higher than there reg.syn. counter parts.
Here's a list of oil's I've used or have in my stash.

A. Mobil 1 5w30 fullsyn. 100(11.) 40(61.7) vi index (172)
B. Mobil 1 10w30 fulsyn. 100(10.1) 40(63.2) vi index (146)
C. Pennzoil 5w30 platinum syn. 100(10.3) 40(56.9) vi index (170)
D. Pennzoil 10w30 platinum syn. 100(10.3) 40(63.3) vi index (150)
E. Valvoline 10w30 fullsyn. maxlife hm. 100(10.8) 40(67.2) vi index (151)
F. Valvoline 5w30 fullsyn. maxlife hm. 10(10.1) 40(59.0) vi index (160)
G. Valvoline 5w30 full synpower 100(10.2) 40(60.1) vi index (158)
H. Valvoline 10w30 full synpower 100(10.8) 40(66.8) vi index (151)
I. Pennzoil 5w30 platinum syn. hm. 100(10.1) 40(55.6) vi index (170)
J. Pennzoil 10w30 platinum syn. hm. 100(10.6) 40(65.1) vi index (152)
K.Pennzoil 0w40 platinum syn. euro 100(13.0) 40(72.2) vi index (183)
L. Castrol gtx magnatec 5w30 100(11.2) 40(68.6) vi index (156)
M. Castrol gtx magnatec 10w30 100(11.6) 40(71.51) vi index (157)
N. Mobil 1 HM fullsyn. 5w30 100(12.1) 40(72) vi index (165)
O. Mobil 1 HM fullsyn. 10w30 100(12.1) 40(78) vi index (149)
P. Quaker state Ultimate Dur. syn. 5w30 100(10.8) 40(60) vi index (178)
Q. Quaker state Ulitimate Dur. syn. 10w30 100(10.3) 40(61) vi index (157)
R. Quaker state hm. synblend 5w30 100(10.7) 40(63.3) vi index (159)
S. Quaker state hm. synblend 10w30 100(10.5) 40(68.4) vi index (141)
T. Pennzoil ultra Platinum syn 5w30 100(10.3 40(56.3) vi index (173)
U. Pennzoil ultra Platinum syn 10w30 100(10.4) 40(62.8) vi index (155)


Pete.

97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive187k miles
03 Saturn Ion 2.2 L4 5spddrive236K miles
PPHM 5w30 x 2 Fram Ultra x 2

Currently under the influence of oil shocked2

Re: Are today's full syn HM oils thicker than non-HM? [Re: cheesepuffs] #4776231
06/03/18 10:28 AM
06/03/18 10:28 AM
Joined: Mar 2011
Posts: 2,198
Indiana
Indydriver Offline
Indydriver  Offline
Joined: Mar 2011
Posts: 2,198
Indiana
Mobil 1 says:

“(HM has a) higher base oil viscosity to help reduce leaks and provide better high temperature protection”

For 5W-30, XOM publishes these viscosity specs:

At 40C: HM=72 / STD = 61.7
At 100C: HM=12.1 / STD = 11.0

So, one must conclude that yes, at least at Mobil1, HMs have higher viscosity or are “thicker” as you say.


2014 Camaro 2SS/RS LS3 Vert 14,000 M1
2012 Sienna 79,000 M1
2007 Tahoe 140,000 PP

Re: Are today's full syn HM oils thicker than non-HM? [Re: cheesepuffs] #4776305
06/03/18 12:49 PM
06/03/18 12:49 PM
Joined: Jun 2011
Posts: 7,210
Mahzurrah!
KCJeep Offline
KCJeep  Offline
Joined: Jun 2011
Posts: 7,210
Mahzurrah!
A few still are. Last I was aware of, Castrol HM, M1 HM and Pennzoil HM were all on the thick side of grade and thicker than their regular line up counterparts.


2018 VW Passat GT VR6 - 3k - Valvoline MST 5w40 - VW OEM filter
2012 KIA Sedona 95k - PP HM 10w30
2009 Ford Focus 133k - Supertech FS HM 5w30
2004 Jeep Grand Cherokee, gone but not forgotten.
Re: Are today's full syn HM oils thicker than non-HM? [Re: cheesepuffs] #4777080
06/04/18 09:21 AM
06/04/18 09:21 AM
Joined: Mar 2010
Posts: 654
NY
mx5miata Offline
mx5miata  Offline
Joined: Mar 2010
Posts: 654
NY
Wow API allows this approved

So I buy 5w30 High mileage and I'm not pouring 5w30, what weight is it?

Since I can't scientifically answer this my guess would be the additive pack in high mileage oils changes its properties at different temperatures and stress loads while maintaining its characteristics of the specified weight.

Last edited by mx5miata; 06/04/18 09:21 AM.

NAPA FULL SYNTHETIC 0w20 Partsplus oil filter
Wix air filter
Re: Are today's full syn HM oils thicker than non-HM? [Re: mx5miata] #4777123
06/04/18 09:58 AM
06/04/18 09:58 AM
Joined: Sep 2013
Posts: 588
Connecticut
cheesepuffs Offline OP
cheesepuffs  Offline OP
Joined: Sep 2013
Posts: 588
Connecticut
Originally Posted By: mx5miata
Wow API allows this approved

So I buy 5w30 High mileage and I'm not pouring 5w30, what weight is it?

Since I can't scientifically answer this my guess would be the additive pack in high mileage oils changes its properties at different temperatures and stress loads while maintaining its characteristics of the specified weight.


There is a tolerance for each grade. You can have two different 30 weight oils that are still slightly different but still fall within range to be called a 30 weight.


2008 Honda Accord Coupe V6
Re: Are today's full syn HM oils thicker than non-HM? [Re: mx5miata] #4777125
06/04/18 10:01 AM
06/04/18 10:01 AM
Joined: Mar 2017
Posts: 7,014
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 7,014
...
Originally Posted By: mx5miata
Wow API allows this approved

So I buy 5w30 High mileage and I'm not pouring 5w30, what weight is it?

Since I can't scientifically answer this my guess would be the additive pack in high mileage oils changes its properties at different temperatures and stress loads while maintaining its characteristics of the specified weight.




Just in case you haven’t seen this;

https://www.bobistheoilguy.com/viscosity-charts/


Cannot see signatures any longer so it doesn’t matter.
Re: Are today's full syn HM oils thicker than non-HM? [Re: cheesepuffs] #4777166
06/04/18 10:45 AM
06/04/18 10:45 AM
Joined: Mar 2010
Posts: 654
NY
mx5miata Offline
mx5miata  Offline
Joined: Mar 2010
Posts: 654
NY
thanks guys very interesting learn something new each day smile


NAPA FULL SYNTHETIC 0w20 Partsplus oil filter
Wix air filter
Re: Are today's full syn HM oils thicker than non-HM? [Re: cheesepuffs] #4778556
06/05/18 07:41 PM
06/05/18 07:41 PM
Joined: Dec 2009
Posts: 26,367
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline
Joined: Dec 2009
Posts: 26,367
Regina, Saskatchewan, Canada
Some are, these days, most are not. If they're ILSAC rated, they won't be appreciably thicker than their non-HM brothers.


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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