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Castrol 0W40 #4663248
02/11/18 06:06 PM
02/11/18 06:06 PM
Joined: Mar 2015
Posts: 1
Canada
ssbtech Offline OP
ssbtech  Offline OP
Joined: Mar 2015
Posts: 1
Canada
My Subaru Outback Turbo has barely burned a drop of oil in its life, which is surprising considering they're somewhat known for it.

I've mostly only used the GC 0W30, but the 0w40 has caught my eye. Not sure why, but it has. The lower price is certainly attractive.

Question is - do I keep buying single jugs of the 0w30, or do I make the switch to the 0w40? I seem to recall that the 0w30 went through a change a couple of years ago? Might be wrong on that.

Any thoughts on the 0w40 in the Subie?

Thanks.

Re: Castrol 0W40 [Re: ssbtech] #4663249
02/11/18 06:07 PM
02/11/18 06:07 PM
Joined: Dec 2011
Posts: 5,103
North Carolina
rooflessVW Online content
rooflessVW  Online Content
Joined: Dec 2011
Posts: 5,103
North Carolina
Switch. Lower cost, small bump in vis.

Very small though - they're basically the same oil.


"Zed's dead baby, Zed's dead."
Re: Castrol 0W40 [Re: ssbtech] #4663270
02/11/18 06:40 PM
02/11/18 06:40 PM
Joined: Dec 2017
Posts: 2,996
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 2,996
SE British Columbia, Canada
40 is 10 more than 30. Itís like having an eleven on your amplifier. (From the movie This is Spinal Tap.) LOL.

Last edited by Snagglefoot; 02/11/18 06:41 PM.

If you want the job done right......do it yourself.
Re: Castrol 0W40 [Re: Snagglefoot] #4663291
02/11/18 07:22 PM
02/11/18 07:22 PM
Joined: Oct 2014
Posts: 12,578
Idaho
CT8 Online content
CT8  Online Content
Joined: Oct 2014
Posts: 12,578
Idaho
Originally Posted By: Snagglefoot
40 is 10 more than 30. Itís like having an eleven on your amplifier. (From the movie This is Spinal Tap.) LOL.
11 is better.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Castrol 0W40 [Re: ssbtech] #4663294
02/11/18 07:27 PM
02/11/18 07:27 PM
Joined: Aug 2004
Posts: 2,012
5600 feet elevation, Arizona
double vanos Offline
double vanos  Offline
Joined: Aug 2004
Posts: 2,012
5600 feet elevation, Arizona
Go for it! Using it in my f150 Ecoboost for 70k miles, no problems at all . Stout oil.


Sabine Schmitz is the Queen of the 'Ring; Svetlana Kapanina is the Queen of the SKIES...
Re: Castrol 0W40 [Re: ssbtech] #4663297
02/11/18 07:30 PM
02/11/18 07:30 PM
Joined: Nov 2006
Posts: 20,572
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,572
MA, Mittelfranken.de
+1 0w40


ASE L1, Master. Deutsch Meisterbrief.
Re: Castrol 0W40 [Re: Trav] #4663394
02/11/18 09:39 PM
02/11/18 09:39 PM
Joined: Aug 2010
Posts: 5,940
Champlain/Hudson Valley
Kira Offline
Kira  Offline
Joined: Aug 2010
Posts: 5,940
Champlain/Hudson Valley
+2 0w40, +1 11

Re: Castrol 0W40 [Re: ssbtech] #4663554
02/12/18 07:19 AM
02/12/18 07:19 AM
Joined: Nov 2016
Posts: 73
Middle Florida
BufordTJustice Offline
BufordTJustice  Offline
Joined: Nov 2016
Posts: 73
Middle Florida
My 2011 Outback 3.6R (just about to turn 120K) had its first OCI with M1 0w-40 and it was notably smoother than any 5w-30 tried before it (PUP, Cast Magnatec, PP, M1, M1 HM). Currently on a run of Pen Plat Euro 0w-40 and it has gotten smoother still. These two and the Castrol 0w-40 are not heavy 40 weight oils....all have 3.8 or under HTHS. Pennzoil and M1 quickly move into the low-3 HTHS arena (as in within the OCI). That's heavy 30 weight territory.

With the noted benefit in smoothness, an MPG penalty that is so low its within the statistical noise of my ability to calculate it, I'm really pleased and will continue using it. The M1 0w-40 had a few 27-28 degree cold starts (cold for Florida) and it behaved just like all the other syn 5w-30 oils I've run.

I think you're just fine.


1999 Porsche 911 Cab 3.4 6-speed -> Mobil Delvac-1 5w-40 ESP (CJ4) -> Fram Ultra XG3675

2011 Subaru Outback 3.6R -> M1 0w-40 FS -> Fram Ultra XG3593A
Re: Castrol 0W40 [Re: ssbtech] #4663575
02/12/18 07:43 AM
02/12/18 07:43 AM
Joined: Aug 2003
Posts: 2,306
NJ
bluesubie Offline
bluesubie  Offline
Joined: Aug 2003
Posts: 2,306
NJ
Originally Posted By: ssbtech

Any thoughts on the 0w40 in the Subie?

That's what I'm running at the moment.


'04 Subaru Forester 2.5XT
Castrol Edge High Mileage
Re: Castrol 0W40 [Re: Kira] #4663686
02/12/18 09:42 AM
02/12/18 09:42 AM
Joined: Apr 2017
Posts: 1,481
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,481
Ontario, Canada
Originally Posted By: Kira
+2 0w40, +1 11


+ eleventy


Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: Castrol 0W40 [Re: ssbtech] #4663696
02/12/18 09:50 AM
02/12/18 09:50 AM
Joined: May 2012
Posts: 1,832
The land of USA-made Subies!
SubieRubyRoo Offline
SubieRubyRoo  Offline
Joined: May 2012
Posts: 1,832
The land of USA-made Subies!
I'd run the PP Euro 0W40. A couple bucks cheaper than the Castrol, and just as good. Had crazy high TBN retention in my Odyssey, an engine known to quickly kill oils due to iVCM and fuel dilution.

Re: Castrol 0W40 [Re: ssbtech] #4664287
02/12/18 08:09 PM
02/12/18 08:09 PM
Joined: Mar 2016
Posts: 1,117
MT
jongies3 Offline
jongies3  Offline
Joined: Mar 2016
Posts: 1,117
MT
My Tacoma seems to like the 0W-40 and it's a true synthetic. I can get 6 quarts for right around $32 at Walmart and it's convenient buying a 5qt jug and a single quart bottle over 6 individual quarts.

I don't think the viscosity is much different. GC 0W-30 was always considered a "thick" 30wt. Your turbo will probably like the 40wt a bit better too, I would imagine, especially if you're a spirited driver!


2004 Toyota Tacoma 3.4 V6: Mobil 1 AFE 0W-30, FRAM TG-3600 filter
1969 Mustang Mach 1 5.8 V8: PYB 10W-30 Napa Gold 1515 filter
1997 Ford F-250 HD 7.3 Powerstroke V8: T6 5W-40 FRAM PH-3786 filter
Re: Castrol 0W40 [Re: ssbtech] #4664642
02/13/18 09:32 AM
02/13/18 09:32 AM
Joined: Sep 2007
Posts: 8,598
Florida
artificialist Offline
artificialist  Offline
Joined: Sep 2007
Posts: 8,598
Florida
Some people say that the Castrol 0w40 is just barely thick enough to be called an Xw40 and Castrol Euro 0w30 is just barely thin enough to be called a Xw30.

The oil analysis sections have articles on both oils.

From what I can see, replacing Castrol Euro 0w30 with Castrol 0W40 will not make a significant difference.

I use Castrol 0w40 in my Mitsu Lancer Ralliart and it doesn't seem to be a problem.


2010 Lancer Ralliart Sportback
Re: Castrol 0W40 [Re: ssbtech] #4664652
02/13/18 09:48 AM
02/13/18 09:48 AM
Joined: Dec 2016
Posts: 94
Indiana, USA
Smoqueed Offline
Smoqueed  Offline
Joined: Dec 2016
Posts: 94
Indiana, USA
The 0w40 is easier to source, atleast for me. I run Mobil 1 0w40 in my 97 firebid formula, she seems to like it. The LT1 engines seem to prefer a thick 30 or thin 40 weight oil from what I've read/experienced. I would use Castrol 0w40 if the Mobil wasn't in stock without issue.


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