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Rethinking grades: 5W-20 vs 0W-20 #4686574
03/06/18 06:57 PM
03/06/18 06:57 PM
Joined: Sep 2009
Posts: 16,484
OH
fdcg27 Offline OP
fdcg27  Offline OP

Joined: Sep 2009
Posts: 16,484
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.


18 Accord Hybrid FF
17 Forester 18K VME 0W-20
12 Accord LX 96K SSO 0W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i
Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27] #4686577
03/06/18 07:01 PM
03/06/18 07:01 PM
Joined: Jun 2002
Posts: 19,775
Iowegia - USA
MolaKule Offline
Global Moderator
MolaKule  Offline
Global Moderator

Joined: Jun 2002
Posts: 19,775
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.


"I can't change the direction of the wind, but I can adjust my sails to always reach my destination." Jimmy Dean
Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27] #4686606
03/06/18 07:26 PM
03/06/18 07:26 PM
Joined: Feb 2018
Posts: 29
NY, USA
DIANgEMinONV Offline
DIANgEMinONV  Offline

Joined: Feb 2018
Posts: 29
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
Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27] #4686611
03/06/18 07:29 PM
03/06/18 07:29 PM
Joined: Aug 2010
Posts: 1,423
pa
benjy Offline
benjy  Offline

Joined: Aug 2010
Posts: 1,423
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

Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27] #4686614
03/06/18 07:32 PM
03/06/18 07:32 PM
Joined: Oct 2014
Posts: 1,451
NoVA
Jimzz Offline
Jimzz  Offline

Joined: Oct 2014
Posts: 1,451
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
Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27] #4686618
03/06/18 07:33 PM
03/06/18 07:33 PM
Joined: Jun 2011
Posts: 1,838
Crawfordville FL
SilverFusion2010 Online content
SilverFusion2010  Online Content

Joined: Jun 2011
Posts: 1,838
Crawfordville FL
Car wont know the difference between 0w and 5w


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30
Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27] #4686637
03/06/18 07:45 PM
03/06/18 07:45 PM
Joined: Apr 2009
Posts: 430
Southern VA
klt1986 Online content
klt1986  Online Content

Joined: Apr 2009
Posts: 430
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.

Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27] #4686638
03/06/18 07:45 PM
03/06/18 07:45 PM
Joined: Sep 2009
Posts: 16,484
OH
fdcg27 Offline OP
fdcg27  Offline OP

Joined: Sep 2009
Posts: 16,484
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.


18 Accord Hybrid FF
17 Forester 18K VME 0W-20
12 Accord LX 96K SSO 0W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i
Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27] #4686651
03/06/18 07:53 PM
03/06/18 07:53 PM
Joined: Dec 2017
Posts: 1,762
US
JLTD Offline
JLTD  Offline

Joined: Dec 2017
Posts: 1,762
US
0w20 might have been specified to make sure you used synthetic. I'd think if you kept your 5w20 synthetic...no issues.


I use the overseas owner's manual to choose my oil.

Using AMSOIL

Hers: 2008 Jeep Liberty 143k, SS 5w30/Amsoil

His: 2015 4Runner 51k, OE 5w30/Wix

Re: Rethinking grades: 5W-20 vs 0W-20 [Re: MolaKule] #4686667
03/06/18 08:01 PM
03/06/18 08:01 PM
Joined: Mar 2013
Posts: 5,322
The Midwest
skyactiv Offline
skyactiv  Offline

Joined: Mar 2013
Posts: 5,322
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

Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27] #4686670
03/06/18 08:02 PM
03/06/18 08:02 PM
Joined: Jan 2018
Posts: 914
San Antonio, TX
das_peikko Online content
das_peikko  Online Content

Joined: Jan 2018
Posts: 914
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.

Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27] #4686685
03/06/18 08:12 PM
03/06/18 08:12 PM
Joined: Jul 2005
Posts: 31,713
NY
demarpaint Offline
demarpaint  Offline

Joined: Jul 2005
Posts: 31,713
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

Re: Rethinking grades: 5W-20 vs 0W-20 [Re: skyactiv] #4686693
03/06/18 08:21 PM
03/06/18 08:21 PM
Joined: Jan 2009
Posts: 2,543
wi
dave123 Offline
dave123  Offline

Joined: Jan 2009
Posts: 2,543
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 Im betting he did.

Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27] #4686704
03/06/18 08:31 PM
03/06/18 08:31 PM
Joined: Apr 2013
Posts: 2,559
The Northeast
mclasser Offline
mclasser  Offline

Joined: Apr 2013
Posts: 2,559
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.

Last edited by mclasser; 03/06/18 08:31 PM.

2018 Hyundai Elantra VE
2013 Honda Pilot EX-L 4WD
2002 Honda Accord EX-L

Re: Rethinking grades: 5W-20 vs 0W-20 [Re: fdcg27] #4686716
03/06/18 08:36 PM
03/06/18 08:36 PM
Joined: Sep 2015
Posts: 6,179
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline

Joined: Sep 2015
Posts: 6,179
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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