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#4473454 - 07/28/17 09:55 PM High mileage 10w40 VS standard hdeo 15w40?
leroyd92 Offline


Registered: 01/21/14
Posts: 494
Loc: AZ
Could high mileage 10w40 be used in place of hdeo 15w40?

It seems like HM oil has stuff in it like hdeo does...

I'm asking because several people have asked me this question in regards to diesel application and also heavy duty gas stuff. (Off road toys or boats )


Id like to hear what you all feel.
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#4473476 - 07/28/17 10:14 PM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
Linctex Offline


Registered: 12/31/16
Posts: 6186
Loc: Waco, TX
Good question!

I don't know if all the pertinent data to make an "educated guess" is available to the public.

10W-40 has had some problems in the past with shearing that 15W-40 typically doesn't suffer from.
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#4473503 - 07/28/17 10:57 PM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
userfriendly Offline


Registered: 06/03/03
Posts: 2649
Loc: LaFinDuMonde
The question should be 15W40 HDEO instead of 10W40 HM. Motorcycle 10w40 when on sale is a good compromise.


Edited by userfriendly (07/28/17 11:00 PM)

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#4473554 - 07/29/17 12:11 AM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
Dyusik Offline


Registered: 09/26/14
Posts: 2005
Loc: US-WA
Only when cold temp comes into play is it a question for me. Otherwise always HDEO get my vote.
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#4473556 - 07/29/17 12:18 AM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
zeng Offline


Registered: 09/01/15
Posts: 2199
Loc: Malaysia
I wouldn't think so.
HDEO 15W40 in place of 10W40, yes.

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#4473670 - 07/29/17 07:12 AM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
ArcticDriver Offline


Registered: 01/27/17
Posts: 1139
Loc: USA
If you are talking about a diesel application then I would think definitely not.





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#4473673 - 07/29/17 07:15 AM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: zeng]
ArcticDriver Offline


Registered: 01/27/17
Posts: 1139
Loc: USA
Originally Posted By: zeng
I wouldn't think so.
HDEO 15W40 in place of 10W40, yes.


+1

Zeng has clearly identified the distinction.
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#4473724 - 07/29/17 08:42 AM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
leroyd92 Offline


Registered: 01/21/14
Posts: 494
Loc: AZ
I need to clarify.

People are buying HM 10w40 to use in place of 15w40.
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#4473832 - 07/29/17 11:21 AM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
BrocLuno Offline


Registered: 09/06/15
Posts: 5621
Loc: Kalifornia Kollective
HDEO has additives to keep soot in suspension and very good base stocks.

10W-40HM may have good base stocks (or a ton of VII's ... frown ) and has nothing for soot. OK in a gasser, not good in a diesel ...


Edited by BrocLuno (07/29/17 11:22 AM)
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Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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#4473856 - 07/29/17 12:08 PM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
Vladiator Offline


Registered: 01/04/16
Posts: 738
Loc: NC

Valvoline MaxLife 15w40. Best of both worlds. HDEO&HM.
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RECOMMENDED oil viscosity lists minimum requirements and is not REQUIRED to keep your warranty, therefore 0w30/0w40 is the better option 99% of the time.

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#4474075 - 07/29/17 06:25 PM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
BrocLuno Offline


Registered: 09/06/15
Posts: 5621
Loc: Kalifornia Kollective
Cool smile
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Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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#4474114 - 07/29/17 07:51 PM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
Oro_O Offline


Registered: 09/20/14
Posts: 1354
Loc: Seattle-ish, WA
Originally Posted By: leroyd92
I need to clarify.

People are buying HM 10w40 to use in place of 15w40.



In a gas engine or in a diesel?

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#4474340 - 07/30/17 04:31 AM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
Garak Offline


Registered: 12/05/09
Posts: 24729
Loc: Regina, Saskatchewan, Canada
If it's something calling for CF or older, probably. But, I wouldn't try it with something new.
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Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, NAPA Gold 7356
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#4474355 - 07/30/17 05:23 AM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
supercity Offline


Registered: 06/12/12
Posts: 1160
Loc: Australia
It meets A3/B3 so it would work ok in some light diesels. For anything really requiring HDEO CG-4 to CI-4+ it would probably be OK for a short interval but why would you?

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#4474620 - 07/30/17 12:06 PM Re: High mileage 10w40 VS standard hdeo 15w40? [Re: leroyd92]
NH73 Offline


Registered: 10/31/14
Posts: 706
Loc: Pa, USA
Stick with HDEO for a diesel. Regular gassers, it would be OK.
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