Recent Topics
2014 Durango ZF8 transmission fluid recommendation
by MoparMan12. 09/19/18 06:45 AM
Does Rear Heater Need to be On?
by Gebo. 09/19/18 05:04 AM
125 years.
by Silk. 09/19/18 12:38 AM
How a VW DSG Transmission works
by StevieC. 09/18/18 10:42 PM
Full Synthetic vs HM Full Synthetic
by SierraMan. 09/18/18 10:06 PM
Champion AGM batteries
by bbhero. 09/18/18 08:53 PM
General opinion about Cooper CS5 Ultra?
by dan_erickson. 09/18/18 08:37 PM
Rotella Online Rebate
by PumpPusher. 09/18/18 08:13 PM
Audi A4 vs Volkswagen CC...or good old Passat?
by KCJeep. 09/18/18 07:19 PM
GM 454 engine
by dirtymudder. 09/18/18 07:13 PM
High Performance Motorcycle oil...which one?
by Neiz15. 09/18/18 06:50 PM
Need help High Performance Motorcycle oil?
by Neiz15. 09/18/18 06:38 PM
MC FL-500S CUT OPEN
by 53' Stude. 09/18/18 05:15 PM
FORD FACTORY FILTER CUT OPEN
by 53' Stude. 09/18/18 05:06 PM
2019 Harley Davidson FXDR 114
by DuckRyder. 09/18/18 04:59 PM
USS Forrestal question
by cjcride. 09/18/18 03:52 PM
Breaker Box
by Throt. 09/18/18 03:00 PM
Honda metal fuel tank seam leak
by wing0. 09/18/18 02:49 PM
Newest Members
vortex64, 19074, Redright9, Clif67, scotstr
66011 Registered Users
Who's Online Now
80 registered members (A310, advocate, 2009Edge, ABomb369, 2013ecof150, 1JCB, 6 invisible), 1,271 guests, and 37 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics290,627
Posts4,847,676
Members66,011
Most Online3,590
Jan 24th, 2017
Donate to BITOG
Previous Thread
Next Thread
Print Thread
Hop To
Page 1 of 8 1 2 8
If 0w-20 in the winter why not 5w30 in the summer #4459651
07/14/17 08:47 PM
07/14/17 08:47 PM
Joined: Sep 2003
Posts: 274
PA
T-Stick Offline OP
T-Stick  Offline OP
Joined: Sep 2003
Posts: 274
PA
So we all know that the industry is moving to 0w20 ... but if that is the right weight for a winter viscosity why would not a lightweight (energy conserving) 5w30 be just as suitable or better in the heat of summer.

Re: If 0w-20 in the winter why not 5w30 in the summer [Re: T-Stick] #4459659
07/14/17 08:57 PM
07/14/17 08:57 PM
Joined: Jan 2010
Posts: 954
North Carolina
4ever4d Offline
4ever4d  Offline
Joined: Jan 2010
Posts: 954
North Carolina
You could do that, no problem. 0w-20 in September and 5w-30 in March. There is just really no need unless you are in the "Great White North". Both oils should do well under normal temp variations.


04 Chevy Colorado 3.5 I5 5w-30 OEF
07 Honda Element 2.4 I4 5w-20 OEM
10 Nissan Rogue AWD 2.5 I4 5w-30 OEF
Amsoil Products & Fram or Wix Filters




Re: If 0w-20 in the winter why not 5w30 in the summer [Re: T-Stick] #4459661
07/14/17 08:58 PM
07/14/17 08:58 PM
Joined: Jan 2009
Posts: 13,834
Illinois
tig1 Offline
tig1  Offline
Joined: Jan 2009
Posts: 13,834
Illinois
If your engine calls for 0-20 5-20 use it year round.


2007 Ford Fusion 232,000 miles
M1 0-20 EP
2017 Ford Fusion 55K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters

Re: If 0w-20 in the winter why not 5w30 in the summer [Re: T-Stick] #4459670
07/14/17 09:05 PM
07/14/17 09:05 PM
Joined: Sep 2008
Posts: 3,889
Southeast Texas
gfh77665 Offline
gfh77665  Offline
Joined: Sep 2008
Posts: 3,889
Southeast Texas
I still think 0-20 or 5-20 for the northern tier and Canada, 5-30 for mid America, and 10-30 for the Gulf Coast, AZ and NM are the optimal weights. One size does not fit all. Houston, TX and Fargo, ND have vastly different climates.

Re: If 0w-20 in the winter why not 5w30 in the summer [Re: T-Stick] #4459678
07/14/17 09:14 PM
07/14/17 09:14 PM
Joined: Aug 2003
Posts: 12,892
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 12,892
NE,Ohio
Originally Posted By: T-Stick
So we all know that the industry is moving to 0w20 ... but if that is the right weight for a winter viscosity why would not a lightweight (energy conserving) 5w30 be just as suitable or better in the heat of summer.


Because your engine is water cooled.

Now if you were going to the track or anything that calls for extended high HP output stepping to the
25% thicker 5w30 might be ideal.

Towing in the mountains..

Then again if your vehicle has Coolers for everything the thin oil works fine.. you only need to step up in viscosity if your oil temp is higher.

-20f in minnesota is alot different that 110f in phoenix.. when you are pushing your vehicle somewhat.


2019 Jeep Cherokee Trailhawk 2.0T
Re: If 0w-20 in the winter why not 5w30 in the summer [Re: Rand] #4459691
07/14/17 09:20 PM
07/14/17 09:20 PM
Joined: Aug 2013
Posts: 2,529
Central Maryland
HangFire Offline
HangFire  Offline
Joined: Aug 2013
Posts: 2,529
Central Maryland
Originally Posted By: Rand
Because your engine is water cooled.


Correct. More to the point, your engine is water cooled, and air temperatures on the hottest of days is still not much more than half of the engine's operating temperature, an almost 100F delta. Unless there is a malfunction or design problem, that's a lot of latitude. I've seen electronics cooling systems where the deltas are 10F between operating and outside cooling. Now that's a challenge.


Various musings: http://hangfire.net
Re: If 0w-20 in the winter why not 5w30 in the summer [Re: T-Stick] #4459779
07/15/17 12:41 AM
07/15/17 12:41 AM
Joined: Nov 2011
Posts: 4,850
MTL, CANADA
Rolla07 Offline
Rolla07  Offline
Joined: Nov 2011
Posts: 4,850
MTL, CANADA
Originally Posted By: T-Stick
So we all know that the industry is moving to 0w20 ... but if that is the right weight for a winter viscosity why would not a lightweight (energy conserving) 5w30 be just as suitable or better in the heat of summer.


Why cant people accept that 0w20 is perfectly effective year around regardless of where you live, for daily driving?


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

Re: If 0w-20 in the winter why not 5w30 in the summer [Re: T-Stick] #4459785
07/15/17 01:06 AM
07/15/17 01:06 AM
Joined: Oct 2015
Posts: 2,650
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline
Joined: Oct 2015
Posts: 2,650
Balearic Islands , Spain
0W-20 will be fine, so will 5W-30, in PA ( Pennsylvania? ) a 5W-30 Synthetic will do just fine too.
If your particular engine has some fancy VVT system though i would stay with 0W-20 as thesse systems tend to work based on oil pressure and don't work right with the wrong viscosity.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.
Re: If 0w-20 in the winter why not 5w30 in the summer [Re: T-Stick] #4459791
07/15/17 02:31 AM
07/15/17 02:31 AM
Joined: Oct 2014
Posts: 2,408
San Antonio, TX
Nyogtha Offline
Nyogtha  Offline
Joined: Oct 2014
Posts: 2,408
San Antonio, TX
Originally Posted By: T-Stick
So we all know that the industry is moving to 0w20 ... but if that is the right weight for a winter viscosity why would not a lightweight (energy conserving) 5w30 be just as suitable or better in the heat of summer.


What vehicle / engine / use / driving style?

I'm running the same 0W-20 PPPP in my 5.7L Hemi with MDS in San Antonio summer I ran in winter when I lived in the Great Lakes area with no problems. I typically run 5W-20 in the warmer 6 months because I bought a LOT of QSUD 5W-20 when it was $0.99 / qt. after stacked rebates at Menards, then had trouble during a Polar Vortex winter that didn't reappear when using 0W-20 the following winter.

My engine oil is water cooled and automatic transmission fluid is air cooled, no thermostats on either oil cooler or transmission fluid cooler (extremely evident during winter when I was living in the Great Lakes area).


"No matter how paranoid you are you're not paranoid enough. Tell the truth. Reach as many people as you can with it. That's your weapon." - Susanne Modeski, aka "Holly" to The Lone Gunmen
Re: If 0w-20 in the winter why not 5w30 in the summer [Re: Rolla07] #4459809
07/15/17 04:36 AM
07/15/17 04:36 AM
Joined: Sep 2014
Posts: 1,403
Seattle-ish, WA
Oro_O Offline
Oro_O  Offline
Joined: Sep 2014
Posts: 1,403
Seattle-ish, WA
Originally Posted By: Rolla07
Originally Posted By: T-Stick
So we all know that the industry is moving to 0w20 ... but if that is the right weight for a winter viscosity why would not a lightweight (energy conserving) 5w30 be just as suitable or better in the heat of summer.


Why cant people accept that 0w20 is perfectly effective year around regardless of where you live, for daily driving?


Because there are much better options for wear protection and other lubrication dimensions, and a lot of people care about that?

That might be a reason.

Re: If 0w-20 in the winter why not 5w30 in the summer [Re: T-Stick] #4459829
07/15/17 06:06 AM
07/15/17 06:06 AM
Joined: Jun 2017
Posts: 388
Western usa
Ammofirst Offline
Ammofirst  Offline
Joined: Jun 2017
Posts: 388
Western usa
My brother does that in all his fords. 3.5 v6

Re: If 0w-20 in the winter why not 5w30 in the summer [Re: T-Stick] #4459832
07/15/17 06:18 AM
07/15/17 06:18 AM
Joined: Sep 2015
Posts: 2,256
Malaysia
zeng Offline
zeng  Offline
Joined: Sep 2015
Posts: 2,256
Malaysia
Originally Posted By: T-Stick
So we all know that the industry is moving to 0w20 ... but if that is the right weight for a winter viscosity why would not a lightweight (energy conserving) 5w30 be just as suitable or better in the heat of summer.

You can, but OEM's won't.
It's about $$$......and CAFE penalty.

Re: If 0w-20 in the winter why not 5w30 in the summer [Re: T-Stick] #4459847
07/15/17 06:54 AM
07/15/17 06:54 AM
Joined: Jun 2005
Posts: 5,243
North Texas
ARB1977 Offline
ARB1977  Offline
Joined: Jun 2005
Posts: 5,243
North Texas
5W20 year round in my wife's CRV. Close to 170K trouble free miles. If it ain't broke don't fix it.

Last edited by ARB1977; 07/15/17 06:55 AM.

2015 Tacoma 4.0L 60K (as of 02/23/18)
AMSOIL SS 0W30 / Toyota filter

2018 CRV 1.5L (as of 05/11/18)
Factory fill / Honda filter
Re: If 0w-20 in the winter why not 5w30 in the summer [Re: T-Stick] #4459859
07/15/17 07:05 AM
07/15/17 07:05 AM
Joined: Sep 2003
Posts: 274
PA
T-Stick Offline OP
T-Stick  Offline OP
Joined: Sep 2003
Posts: 274
PA
The question is not posed for any particular vehicle, or for personal advice or for warranty considerations. The question is purely empirical. Most vehicle manuals recognize temperature ranges as part of the oil selection criteria even if they specify one recommended viscosity such 0w20. My point simply is that the viscosity of a 20 weight in winter temps of 0-10 degrees after the oil is warm cannot be that much different from the viscosity of a light 5w30 in 95-100 degree weather in the summer. The cooling system will usually not be able to completely uniform engine temps despite outside weather.

So my point is that if a heavy 20 weight is optimum for protection and performance, then probably a lightweight 5w30 is optimum in the heat of summer because 5w30 will often thin to a heavy 20 weight in hot temps while a 20 weight may thin more than what is optimum.

Last edited by T-Stick; 07/15/17 07:07 AM.
Re: If 0w-20 in the winter why not 5w30 in the summer [Re: T-Stick] #4459947
07/15/17 09:08 AM
07/15/17 09:08 AM
Joined: Jul 2003
Posts: 3,097
San Antonio, TX
jorton Offline
jorton  Offline
Joined: Jul 2003
Posts: 3,097
San Antonio, TX
It is a challenging topic. I was just reading the 17 ford focus uoa post. FF is 5-50 that thinned to a 30 I think.

There must be something different about the engine in that focus. Clearly Ford does not want 20 grade oil in that model.


"If everything seems under control, you're just not going fast enough."
- Mario Andretti


Page 1 of 8 1 2 8

BOB IS THE OIL GUY® Powered by UBB.threads™