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Running 0w40 or 5w40 #4499197
08/27/17 06:48 AM
08/27/17 06:48 AM
Joined: Feb 2008
Posts: 1,065
MA.
Camprunner Offline OP
Camprunner  Offline OP
Joined: Feb 2008
Posts: 1,065
MA.
Just wondering who here is running either 0w40 or 5w40 when there car or truck recommends either a 20 weight or 30 weight oil?

I have used M1 0w40 in my 2012 Nissan Pathfinder V6 and noticed no difference in fuel millage and my idle seemed to improve for the full OCI.

Re: Running 0w40 or 5w40 [Re: Camprunner] #4499201
08/27/17 06:59 AM
08/27/17 06:59 AM
Joined: Jan 2017
Posts: 1,139
USA
ArcticDriver Offline
ArcticDriver  Offline
Joined: Jan 2017
Posts: 1,139
USA
Why would viscosity effect idle?


Multiple Diesel and Gasoline vehicles
Re: Running 0w40 or 5w40 [Re: ArcticDriver] #4499207
08/27/17 07:08 AM
08/27/17 07:08 AM
Joined: Feb 2008
Posts: 1,065
MA.
Camprunner Offline OP
Camprunner  Offline OP
Joined: Feb 2008
Posts: 1,065
MA.
Originally Posted By: ArcticDriver
Why would viscosity effect idle?


I am as confused about that as you are?? I just can't explain it.

Re: Running 0w40 or 5w40 [Re: Camprunner] #4499243
08/27/17 07:48 AM
08/27/17 07:48 AM
Joined: Jan 2017
Posts: 1,139
USA
ArcticDriver Offline
ArcticDriver  Offline
Joined: Jan 2017
Posts: 1,139
USA
Originally Posted By: Camprunner
Originally Posted By: ArcticDriver
Why would viscosity effect idle?


I am as confused about that as you are?? I just can't explain it.


What do you mean with "Improved Idle"?

Is this a difference in idle RPM at the tach? Or do you mean it just "feels" smoother, quieter, etc..?

I have found that a different motor oil can result in different engine "feel" just like a fresh oil change using the same brand oil.


Multiple Diesel and Gasoline vehicles
Re: Running 0w40 or 5w40 [Re: Camprunner] #4499291
08/27/17 08:46 AM
08/27/17 08:46 AM
Joined: Feb 2008
Posts: 1,065
MA.
Camprunner Offline OP
Camprunner  Offline OP
Joined: Feb 2008
Posts: 1,065
MA.
Since day one my 4.0 in my Nissan has always had a significant amount of vibration that you can feel threw the drivers seat and through the steering wheel. The vibration seems to go away with adding more rpm at idle and it is not felt when driving. When I run a 0w40 the idle seems to increase just enough so the vibration can't be felt and I also get less engine noise so it seems.

Re: Running 0w40 or 5w40 [Re: Camprunner] #4499325
08/27/17 09:20 AM
08/27/17 09:20 AM
Joined: Feb 2010
Posts: 79
North Central Illinois
EyesofThunder Offline
EyesofThunder  Offline
Joined: Feb 2010
Posts: 79
North Central Illinois
Is it a variable valve timing engine? The change in viscosity could change the cam positioning some. Lower overlap at idle smooths idle.

Re: Running 0w40 or 5w40 [Re: Camprunner] #4499346
08/27/17 09:31 AM
08/27/17 09:31 AM
Joined: Mar 2004
Posts: 1,482
Flaherty, KY
92saturnsl2 Offline
92saturnsl2  Offline
Joined: Mar 2004
Posts: 1,482
Flaherty, KY
I'm currently using Pennzoil Ultra Platinum 5w-40 in a '04 Odyssey with J35A4 engine that specs 5w-20. I did it this summer in an effort to combat oil consumption (with 5w-20, it'd use about 2.5 quarts in a 6-7k OCI); it's too early to tell yet if it's helped in that regard.

Since purchasing it at 130k miles (has about 175k now), I'd only used 0w/5w-20 and once or twice used Mobil1 0w-30 AFE. I really can't tell the difference between any of them, the engine runs the same and had always used about the same amount of oil regardless of what was used. The 5w-40 this time is a curiousity thing, to see if it might help. I feel like it may not rev as fast, perhaps not as responsive using the thicker oil, but the difference is minimal. This engine has VTEC and the thicker oil has made no difference with the VTEC solenoid that activates the second cam profile.


1985 F-250HD 7.5L 4x4 135k- Castrol GTX 15w-40 HDEO
04 Odyssey EX 182k PUP 0w-40
96 Maxima GLE 250k QS Defy 5w-30
07 Chrysler Pacifica Limited 129k Chevron Supreme 5w-20
Re: Running 0w40 or 5w40 [Re: Camprunner] #4499406
08/27/17 11:06 AM
08/27/17 11:06 AM
Joined: Nov 2011
Posts: 4,967
MTL, CANADA
Rolla07 Offline
Rolla07  Offline
Joined: Nov 2011
Posts: 4,967
MTL, CANADA
Ive run 0w40 on my car that specs 5w30. No issues or change in consumption. Ive also run 0w20 and 5w20 with no noticeable difference. Once back in day someone put 5w50 in and I did notice a significant decrease in gas mileage.


2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967

Re: Running 0w40 or 5w40 [Re: Camprunner] #4499445
08/27/17 12:05 PM
08/27/17 12:05 PM
Joined: Apr 2013
Posts: 2,420
The Northeast
mclasser Offline
mclasser  Offline
Joined: Apr 2013
Posts: 2,420
The Northeast
I've used M1 0w40 (old formulation) in my Infiniti that calls 5w30. No scientific data but the engine sounded very smooth.


2018 Hyundai Elantra VE -- 6K
2013 Honda Pilot EX-L 4WD -- 57K
2002 Honda Accord EX-L -- 212K

Re: Running 0w40 or 5w40 [Re: Camprunner] #4499585
08/27/17 03:22 PM
08/27/17 03:22 PM
Joined: Feb 2010
Posts: 79
North Central Illinois
EyesofThunder Offline
EyesofThunder  Offline
Joined: Feb 2010
Posts: 79
North Central Illinois
I've often wondered are the variable valve timing, VVTi, VTEC, etc THAT sensitive to oil viscosity?

Some say that xW20 oils are only spec'd in the US/North America and not overseas, IF that is true (I can't figure out how to find out), do the OEM's change the variable valve timing orifices?

Re: Running 0w40 or 5w40 [Re: Camprunner] #4499652
08/27/17 04:54 PM
08/27/17 04:54 PM
Joined: Apr 2016
Posts: 1,585
Oregon
1JZ_E46 Offline
1JZ_E46  Offline
Joined: Apr 2016
Posts: 1,585
Oregon
0W-40 is typically a thinner base oil with more viscosity index improvers to achieve KV100, hence why they usually have higher NOACK figures versus the same oil in 5W-40. Typically a better quality base-stock, though, to achieve 0W pour point and cold crank.


2007 X5 4.8i: M1 HM 10W-30
2016 Countryman S: EDGE 0W-30
Re: Running 0w40 or 5w40 [Re: Camprunner] #4499745
08/27/17 06:47 PM
08/27/17 06:47 PM
Joined: Apr 2007
Posts: 2,997
WI.
dblshock Offline
dblshock  Offline
Joined: Apr 2007
Posts: 2,997
WI.
Civic at 25k now.. 12k on 0/40, better upgrade early to avoid excessive wear...upgraded that the fuel and UHP tires, real nice.

Last edited by dblshock; 08/27/17 06:48 PM.

16 Civic Coupe Touring 38k
640:1 TCW-3 E091
Edge 0/40 XG7317
Firehawk Indy 500

06 4Runner SR5 146k
640:1 TCW-3
PP 5/30 XG3614
Falken Wildpeak AT3W
Re: Running 0w40 or 5w40 [Re: Camprunner] #4499823
08/27/17 08:10 PM
08/27/17 08:10 PM
Joined: Jan 2016
Posts: 848
NC
Vladiator Offline
Vladiator  Offline
Joined: Jan 2016
Posts: 848
NC
I am using Pennzoil 0w40 in 2009 Scion xB that specs 0w20. Engine is nice and smooth, definitely smoother than 0w20. Fuel economy is the same on both viscosities.

Re: Running 0w40 or 5w40 [Re: Camprunner] #4499835
08/27/17 08:23 PM
08/27/17 08:23 PM
Joined: Sep 2010
Posts: 7,481
Texas & Global
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,481
Texas & Global
Mobil 1-FM 5w40 in ecoboost & Delvac 15w40 in 5.3L ... both tested quieter than 5w30 ... don't notice any other difference


2018 Chevy 1500 Z71 4WD
2017 Chevy Tahoe LT 4WD
2014 Fusion Hybrid Titanium
2013 Cruze LTZ - RS Turbo
Re: Running 0w40 or 5w40 [Re: 4WD] #4499843
08/27/17 08:33 PM
08/27/17 08:33 PM
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
bigj_16 Offline
bigj_16  Offline
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
Originally Posted By: 4WD
Mobil 1-FM 5w40 in ecoboost & Delvac 15w40 in 5.3L ... both tested quieter than 5w30 ... don't notice any other difference

"FM"?

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