Recent Topics
Decent Wireless Computer Headset?
by 99Saturn
06/25/16 11:41 PM
Need Fuel Pump Assembly for Camry
by Nick1994
06/25/16 11:36 PM
2015 Accord V6 VCM engine UOA 36,680 mi / 9812 OCI
by TNM1982
06/25/16 10:55 PM
Why did Toyota recommend a winter and summer oil?
by BrianApp
06/25/16 10:00 PM
Fram TG 7317 6k miles
by bbhero
06/25/16 09:57 PM
Sta-Lube Moly-Graph Grease
by JHZR2
06/25/16 09:20 PM
Dead battery locks me out of Altima!
by Tom NJ
06/25/16 08:56 PM
Second lawn mower blade
by greasegunn
06/25/16 08:11 PM
Echo weed trimmer - carb issue?
by ryan2022
06/25/16 07:13 PM
Reviving Old Hard Rubber Experiment
by sleddriver
06/25/16 04:47 PM
Where do pets go?
by Whitewolf
06/25/16 04:47 PM
Help reading Bosch 3330 date code
by beavis87
06/25/16 04:11 PM
Newest Members
paul2005tb, Martyaus, carmelo, Shellman, SSO
58272 Registered Users
Who's Online
28 registered (2004tdigls, bdcardinal, 2015_PSD, asand1, Andy636, 6 invisible), 956 Guests and 11 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
58272 Members
66 Forums
250818 Topics
4110836 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#3247387 - 01/13/14 07:10 PM 5w-30 shear toward 5w-20s
Errtt Offline


Registered: 11/14/10
Posts: 2389
Loc: California
Did a little reading at work today about some 5w-30s shear down close to 5w-20. So if a car specs 5w-20 recommended, but 5w-30 can be used (higher temps etc), why not just go and stick with 5w-30 if it shears toward 5w-20 since 5w-20 is the most recommended if it specs for it.

Thinking in terms of GDI & dilution - specs 5w-20 and dilution compared to 5w-30 and dilution.

Top
#3247402 - 01/13/14 07:22 PM Re: 5w-30 shear toward 5w-20s [Re: Errtt]
AP9 Offline


Registered: 07/10/13
Posts: 256
Loc: Chicago suburbs
That's what I would do, but that's just me. Better a little too thick than a little too thin.
_________________________
2000 Ford Explorer XLT 4WD (4.0L OHV) - QSUD 5W-30/MC FL1A
1996 Chevrolet Impala SS - M1 0W-40/M1-201

Top
#3247408 - 01/13/14 07:26 PM Re: 5w-30 shear toward 5w-20s [Re: Errtt]
Eddie Offline


Registered: 12/07/03
Posts: 8114
Loc: Florida, Cape Coral
I wonder if we know what oil-engine combinations, that holds true for? Would not the company engineers know that when making their oil change recommendations? One thing I do know from my owners manual is that 0w20 in a recommendation in USA & Canada only and 5w30 elsewhere. Ed
_________________________
CX5 Touring 2.5L :-)

Top
#3247429 - 01/13/14 07:48 PM Re: 5w-30 shear toward 5w-20s [Re: Errtt]
friendly_jacek Offline


Registered: 05/04/03
Posts: 6430
Loc: southeast US
Yap, going from 5W30 to 5W20 is very similar to Dexron III to VI transition. Should be backward compatible in most (but not all) applications.

Top
#3247488 - 01/13/14 08:40 PM Re: 5w-30 shear toward 5w-20s [Re: Errtt]
brandini Offline


Registered: 10/08/09
Posts: 1154
Loc: Richmond, VA
Not all cars shear and not at 5w-30s shear, so grain of salt on those broad generalizations.
_________________________
07 Mazda3s Hatch - ZoomZoom - Using EAO-ALM-BF3-MTG-ANT-ATF

Top
#3247500 - 01/13/14 08:52 PM Re: 5w-30 shear toward 5w-20s [Re: Errtt]
Shannow Online   content


Registered: 12/12/02
Posts: 33127
Loc: Oz
"some" is the operational word there.

I had a mess with some charts and numbers a few days ago...

http://www.bobistheoilguy.com/forums/ubb...ngs#Post3243503

Top