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Why isnt 10w30 dexos? #4729472
04/16/18 11:43 PM
04/16/18 11:43 PM
Joined: Oct 2015
Posts: 263
Washington
Dylan1303 Online content OP
Dylan1303  Online Content OP
Joined: Oct 2015
Posts: 263
Washington
So my cruze is tuned on 18-20 psi of boost. Stock is around 12 psi. Im currently using penn euro 0w40. I was thinking on next oci to switch to pp 5w30 or pp 10w30. Im just wondering why the pp 10w30 doesnt meet Dexos1g2 or any dexos. Does it have the same specs to meet like timming chain wear as 5w30 does? Im jw if i could use 10w30 for the lower noack but still have great protection. Someone also said that the 0w40 in my cruze will cause a little more turbo lag. They said because i have a variable volume oil pump it will make a bigger load on the engine to pump the thicker oil. I can see where hes comming from but i cant image that the butt dyno could feel that.


12 cruze rs 1.4t 6spd pp 5w30 tuned on 22psi
13 equinox 2.4 awd pp 5w30
Re: Why isnt 10w30 dexos? [Re: Dylan1303] #4729476
04/17/18 12:08 AM
04/17/18 12:08 AM
Joined: Jul 2015
Posts: 4,629
Down Under
SR5 Offline
SR5  Offline
Joined: Jul 2015
Posts: 4,629
Down Under
10W30 is not a Dexos oil viscosity grade, I assume it's just to minimise cold weather confusion as 5W30 works everywhere.

It is a fine viscosity grade for people in warm climates, and I would have no concern with M1 or PP or Edge 10W30 meeting all the quality requirements of Dexos1, but it's just not the accepted Dexos viscosity grade.


Castrol GTX Ultraclean 15W40 A3/B3 + Wesfil-Cooper Z154
Re: Why isnt 10w30 dexos? [Re: Dylan1303] #4729480
04/17/18 12:15 AM
04/17/18 12:15 AM
Joined: Feb 2008
Posts: 1,105
PA
umungus1122 Offline
umungus1122  Offline
Joined: Feb 2008
Posts: 1,105
PA
Yes, GM doesn't spec 10w for anything anymore, so there's no reason to have it tested. No doubt it will work just fine.


'95 Chevy 1/2t 305 205k -NexGen Maxlife 5w-30, Wix filter
'89 Jeep Comanche 4.0 278k - GC 0w-30, Bosch LongLife filter
Re: Why isnt 10w30 dexos? [Re: Dylan1303] #4729496
04/17/18 01:32 AM
04/17/18 01:32 AM
Joined: Dec 2009
Posts: 25,600
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline
Joined: Dec 2009
Posts: 25,600
Regina, Saskatchewan, Canada
The dexos1 spec also has MRV and CCS requirements, as Shannow discovered, and a 10w-30 would not be able to pass them.


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
Re: Why isnt 10w30 dexos? [Re: Dylan1303] #4729593
04/17/18 07:06 AM
04/17/18 07:06 AM
Joined: Jun 2015
Posts: 4,281
New England
Virtus_Probi Offline
Virtus_Probi  Offline
Joined: Jun 2015
Posts: 4,281
New England
As far as I can tell, this engine is not direct injected, so you don't have LSPI to worry about (a big reason to go with dexos1 Gen 2 in my opinion).
I'd say that any thoughts about the timing chain wear performance of a 10W30 vs. a dexos1 Gen 2 5W30 would just be speculation, but I can't imagine that PP 10W30 would be a real loser in that department.
Have you seen a NOACK loss result for PP 10W30? I might have missed that as I don't look to hard at 10WXX oils.
When I ran a high HTHS 5W30 (3.58 compared to 3-3.1 in my previous oils), it didn't feel sluggish in my turbo but the oil definitely ran a little bit hotter...made sense because the losses are higher in the thicker oil. I doubt that you will notice much difference in power by dropping to a 30, but I guess there have been a few complaints on here about an XW40 not feeling right in some engines.


2014 Forester XT, 90000 miles
Last Change;
M1 5W30 d1G2
Tokyo Roki 15208AA170 filter
Re: Why isnt 10w30 dexos? [Re: Dylan1303] #4729603
04/17/18 07:17 AM
04/17/18 07:17 AM
Joined: Oct 2009
Posts: 3,342
Wet side WA
JohnnyJohnson Offline
JohnnyJohnson  Offline
Joined: Oct 2009
Posts: 3,342
Wet side WA
I frankly don't care if 10w-30 is D1G2. Yes I think D1G2 is good oil but non Dexos can be had at a good price. Example this week I picked up three jugs of Havoline 10W-30 $13 a Jug shipped. That's my Toyota's summer oil. My car ran on 10W-30 conventional for about seven years of its life before I switched to full synthetic 5W-30. In a 5000 mile the typical OCI it consistently uses under a quarter quart in that mileage. I'm sticking with what got it this far this long. Best oil I can buy for under $20 a jug. I do use the higher efficiency filters. But two OIC's a year is the general rule and both of them together cost me under $60.


2004 Corolla 125400
Out: VML 5w-30 TG4967 OCI 5007 Miles
In: EDGE EP 5W-30 Bosch 3311 122537 7-18-18
2006 Duramax 74277
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 74705 4-22-18
Re: Why isnt 10w30 dexos? [Re: Dylan1303] #4729614
04/17/18 07:28 AM
04/17/18 07:28 AM
Joined: Dec 2017
Posts: 2,512
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 2,512
SE British Columbia, Canada
Iím thinking GM went through a bad experience with the AFM lifter failures prior to 2014. Part of the problem may have been the cold startups with oils thicker than 5w30. The redesign involved different lifters, higher oil pressure, a larger oil filter with a higher by-pass pressure, and thinner oil.


If you want the job done right......do it yourself.
Re: Why isnt 10w30 dexos? [Re: Dylan1303] #4729679
04/17/18 08:38 AM
04/17/18 08:38 AM
Joined: May 2009
Posts: 12,250
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline
Joined: May 2009
Posts: 12,250
N.H, U.S.A.
I'm running QSUD 10w30 non dexos and its BETTER than any dexos oil ive run.

I HIGHLY recommend it in your turbo application.

Its got my rogue 2.5 making all of its 170+ HP.

More than my Mustang 5.0 V8 in the 80's.


2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter

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