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#4686574 - 03/06/18 05:57 PM Rethinking grades: 5W-20 vs 0W-20
fdcg27 Offline


Registered: 09/25/09
Posts: 15687
Loc: OH
I've been wondering recently whether I should continue with a 0W in our long out of warranty '12 Accord or go to a 5W.
We don't live in an areas where it ever gets cold enough that the 0W qualification would matter and there seem to be some advantages in a 5W-20 over a 0W-20.
When comparing oils of similar brand and quality, the 5W will always have lower volatility, which should help to prevent sticky rings over the years and miles. The 5W will also have a lower VII load, which should lead to less deposits over the years and miles.
Is there any real advantage in the 0W-20 grade?
I'm not sure that I can see one even though this grade is now widely recommended.
_________________________
17 Forester 12K MSS 0W-20
12 Accord LX 86K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i

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#4686577 - 03/06/18 06:01 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27]
MolaKule Offline


Registered: 06/05/02
Posts: 19042
Loc: Iowegia - USA
We recently purchased a 2015 PathFinder which specs 0W20, so I made up a batch of 5W20 HM and the engine runs smoother with better response.

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#4686606 - 03/06/18 06:26 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27]
DIANgEMinONV Offline


Registered: 02/23/18
Posts: 20
Loc: NY, USA
Usually, the same engines in other countries specify that thicker oil should be used. For example, Honda indicates that the 0W-20 should be used in the J35 V-6 in the USA, however, the same engine in other countries calls for 5W-30 viscosity oil. My certified Honda mechanic recommends to use the 5W-30 for more protection, and this is what I'm planning to do in my 5W-20 specified Accord V-6 the next time I change my oil.
_________________________
2008 Honda Accord EX V6 Sedan

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#4686611 - 03/06/18 06:29 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27]
benjy Offline


Registered: 08/23/10
Posts: 865
Loc: pa
from reading it seems smaller spreads of viscosity is better especially with mineral oils, PAO + Ester oils are a truely different animal, but usually overkill for most typical drivers

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#4686614 - 03/06/18 06:32 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27]
Jimzz Offline


Registered: 10/03/14
Posts: 1140
Loc: NoVA
I use 5w30 in most vehicles that call for 0/5w20. As said many cars in the US that call for thin oil call for 5w30 else where that does not have to meet CAFE standards.

My truck calls for 5w20 but I run a mix of 10w30/5w30, what ever I have in the shop.
_________________________
yup

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#4686618 - 03/06/18 06:33 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1657
Loc: Crawfordville FL
Car wonít know the difference between 0w and 5w
_________________________
2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30

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#4686637 - 03/06/18 06:45 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27]
klt1986 Offline


Registered: 04/08/09
Posts: 384
Loc: Southern VA
Originally Posted By: fdcg27
I've been wondering recently whether I should continue with a 0W in our long out of warranty '12 Accord or go to a 5W.
We don't live in an areas where it ever gets cold enough that the 0W qualification would matter and there seem to be some advantages in a 5W-20 over a 0W-20.
When comparing oils of similar brand and quality, the 5W will always have lower volatility, which should help to prevent sticky rings over the years and miles. The 5W will also have a lower VII load, which should lead to less deposits over the years and miles.
Is there any real advantage in the 0W-20 grade?
I'm not sure that I can see one even though this grade is now widely recommended.


I have pretty much the same thoughts as you concerning 5w-20 versus 0w-20.
_________________________
Wife: 08 Honda CR-V 4WD, M1 5W-20
Me: 11 Toyota Tundra DC 4WD 5.7L, PP 0W-20
Me Work: 06 Ford Explorer 4WD 4.0L, Pennzoil 5W-30
Son: 14 Toyota Corolla S, M1 AFE 0W-20

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#4686638 - 03/06/18 06:45 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27]
fdcg27 Offline


Registered: 09/25/09
Posts: 15687
Loc: OH
I guess I didn't express my point clearly enough in my original post.
Everyone knows about CAFE, other market specs as well as that the engine won't know the difference.
I simply wonder whether I'm missing something in a market where all newer engines seem to have the 0W-20 grade recommended for them.
Nothing wrong with the 0W-20 grade, but going with a 5W-20 looks to me like all upside.
_________________________
17 Forester 12K MSS 0W-20
12 Accord LX 86K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i

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#4686651 - 03/06/18 06:53 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27]
JLTD Offline


Registered: 12/15/17
Posts: 644
Loc: US
0w20 might have been specified to make sure you used synthetic. I'd think if you kept your 5w20 synthetic...no issues.
_________________________
His: 2015 4Runner SR5 1GR-FE 37k, Amsoil OE 5w20/Wix
Testing vs Amsoil OE 5w30...then longer OCI on SS

Hers: 2008 Jeep Liberty 134k, Amsoil SS 5w30/Amsoil, minimum 10k oci

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#4686667 - 03/06/18 07:01 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: MolaKule]
skyactiv Offline


Registered: 03/02/13
Posts: 4394
Loc: The Midwest
Originally Posted By: MolaKule
We recently purchased a 2015 PathFinder which specs 0W20, so I made up a batch of 5W20 HM and the engine runs smoother with better response.


You formulated your own oil from scratch?
_________________________
Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual

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#4686670 - 03/06/18 07:02 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27]
das_peikko Offline


Registered: 01/01/18
Posts: 500
Loc: San Antonio, TX
The world does not need 0W-20, 0W-30, or 0W-40. Totally useless grades.

Replace all the zeros with a 5 and the sun will still rise the next day.

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#4686685 - 03/06/18 07:12 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27]
demarpaint Offline


Registered: 07/03/05
Posts: 29746
Loc: NY
Originally Posted By: fdcg27
I've been wondering recently whether I should continue with a 0W in our long out of warranty '12 Accord or go to a 5W.
We don't live in an areas where it ever gets cold enough that the 0W qualification would matter and there seem to be some advantages in a 5W-20 over a 0W-20.
When comparing oils of similar brand and quality, the 5W will always have lower volatility, which should help to prevent sticky rings over the years and miles. The 5W will also have a lower VII load, which should lead to less deposits over the years and miles.
Is there any real advantage in the 0W-20 grade?
I'm not sure that I can see one even though this grade is now widely recommended.


I bought into the 0W20 and 0W30 hype a few years back. The more I read up on it the happier I am that I swung back to 5w30 across the board. For my climate the 5W is a better choice imo for the reasons you stated. Unless you live in a very cold climate I think you're better off with 5w20 oil in your application.
_________________________
God Bless Our Troops


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#4686693 - 03/06/18 07:21 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: skyactiv]
dave123 Offline


Registered: 01/13/09
Posts: 2313
Loc: wi
Originally Posted By: skyactiv
Originally Posted By: MolaKule
We recently purchased a 2015 PathFinder which specs 0W20, so I made up a batch of 5W20 HM and the engine runs smoother with better response.


You formulated your own oil from scratch?

Yes Iím betting he did.

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#4686704 - 03/06/18 07:31 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27]
mclasser Offline


Registered: 04/13/13
Posts: 2226
Loc: The Northeast
Correct me if I am wrong, but shouldn't a 0- and 5w20 syn have about the same viscosity at operating temp? So the 0w & 5w part mainly matter on cold starts. Better flow on cold starts with a 0w20 is a plus, not-to-mention the better base stocks. I can understand avoiding 0w20 on an oil burner, though.

FWIW, my Pilot calls for 0w20 and that's what I plan on using indefinitely. Maybe as it gets older, I'll go to a HM 0w20 but that's it.


Edited by mclasser (03/06/18 07:31 PM)
_________________________
2018 Hyundai Elantra VE -- 3K
2013 Honda Pilot EX-L 4WD -- 55K
2002 Honda Accord EX-L -- 210K


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#4686716 - 03/06/18 07:36 PM Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27]
BrocLuno Offline


Registered: 09/06/15
Posts: 5511
Loc: Kalifornia Kollective
There is no real "better cold flow"... If it flows, the positive displacement pump moves the same amount in both cases.

Since we all lived OK for decades on 10W-30 (even in OH), why even bother with the 5W ...
_________________________
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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