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Sunday 40w discussion #5074436 04/14/19 08:53 AM
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Snagglefoot Offline OP
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Here is the oil selection suggestions from the 2019 Ford Super Duty Owners manual.

Given a person chose Severe Duty Service, would you choose your grade based on the minimum temperature such as 0w40, 5w40, and 15w40, or do you believe the protection is best with 15w40.

I noticed a bias towards 15w40, but the lubricant companies have come out with these 0w40 lubricants. What’s your opinion? smile

E8D16D3E-BD7A-40B7-B049-8596FD68DFB4.jpegFA81F972-EF25-4F6E-9664-E1EA19FDCDE7.jpeg

If you want the job done right......do it yourself.
Re: Sunday 40w discussion [Re: Snagglefoot] #5074445 04/14/19 09:01 AM
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CT8 Offline
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I would pick an XW-40. 15W-40 if the starting temps were inline with the choice

Re: Sunday 40w discussion [Re: Snagglefoot] #5074467 04/14/19 09:17 AM
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beanoil Offline
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15w40 all day long if you do not have cold starting temps.

Re: Sunday 40w discussion [Re: Snagglefoot] #5074468 04/14/19 09:18 AM
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double vanos Offline
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Hard to choose! With Rotella having so many grades now I’d chose it, and the weight would be dictated by the ambient temp range of the area.


Sabine Schmitz is the Queen of the 'Ring; Svetlana Kapanina is the Queen of the SKIES...
Re: Sunday 40w discussion [Re: Snagglefoot] #5074469 04/14/19 09:18 AM
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Kamele0N Offline
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Same here...5w40 or 10w40....

Manufacturers somehow ban 10w40 grade because it tend to be"sludge monster" some....50+ yrs ago smile


2008 Toyota Yaris 1ND-TV 1.4 D4-D Tech9 5W30 C3 VW 504/507
1997 Toyota Landcruiser KZJ95 3.0 TD Elf Evolution NF900 5W40
Re: Sunday 40w discussion [Re: beanoil] #5074524 04/14/19 09:49 AM
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JLTD Online Shocked
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Originally Posted by beanoil
15w40 all day long if you do not have cold starting temps.



OR if you can plug in your oil pan heater all winter.


I use the overseas manual to choose my viscosity.


Hers: 2008 Jeep Liberty 154k, SS 5w30/Amsoil
Looking at options.

His: 2015 4Runner 60k, SS 5w20/Amsoil

Re: Sunday 40w discussion [Re: Snagglefoot] #5074563 04/14/19 10:22 AM
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roadrunner1 Offline
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I own a '15 6.7 Powerstroke and have run nothing but 10w-30. I haul heavy and tow, UOA,s have always came back good with the exception of the last due to a fuel additive that is known to increase FE levels(Enerburn).
The truck just rolled 100,000 mi. Fri. with no issues, and I do let the IOLM dictate my oil changes, which in my usage is usually 10,000 mi.


'15 F350 6.7
Re: Sunday 40w discussion [Re: Snagglefoot] #5074624 04/14/19 11:33 AM
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Bighorn2500 Offline
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Keeping your location with low temps in mind 10w30 or 5w40 year around would be my choice.

I can usually find VPBE, Delvac 1, or T6 5w40 on sale or rebate for my Cummins throughout the year and buy to keep on the shelf.


2012 Ram 2500 SLT 6.7L Cummins 4x4
2018 Dodge Durango GT 3.6L 4x4
Re: Sunday 40w discussion [Re: Snagglefoot] #5074649 04/14/19 11:57 AM
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rileyc Offline
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If a low temperature climate is not a factor, then either an API Licensed CK4 conventional 10W30 or 15W40 will work just fine. If you are really concerned about a severe duty application, a high-quality 15W40 conventional HDEO is a good option. Conventional CK4 formulations provide excellent wear protection. If you are watchful, you can purchase conventional HDEOs when they are on sale along with a manufacturer's rebate...a very cost effective solution.

Re: Sunday 40w discussion [Re: Snagglefoot] #5074666 04/14/19 12:07 PM
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BeerCan Offline
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I like to use Xw40 in my powerstroke because I use bio blended fuels. otherwise I would probably be fine with the 10w30. I was using 5w40 for awhile but then I figured 15w40 was a more reasonable choice in FL. It will end up saving me close to $100 a year on oil changes based on my 30K+ a year average mileage.


2020 Porsche Cayenne
2017 Ford F250 6.7 PS
2016 Ford F150 3.5 EB
2016 Porsche 981 GTS
2015 Ford Mustang 2.3 EB
My car list is getting long smile
1994 Porsche 968 Coupe
1987 Porsche 944 Turbo
Re: Sunday 40w discussion [Re: Kamele0N] #5074855 04/14/19 03:49 PM
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Garak Offline
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Originally Posted by Kamele0N
Manufacturers somehow ban 10w40 grade because it tend to be"sludge monster" some....50+ yrs ago smile

You're also going to have trouble finding a 10w-40 in North America with a modern API diesel spec or an ACEA E specification. The last time I saw an actual 10w-40 HDEO here (not saying they don't exist; I just don't see them anywhere and I've only seen a couple data sheets in the last five or so years) was in the CG-4 days. I know Shell lists a 10w-40 in CJ-4/SM, but I've never seen it in the wild, and Petro-Canada used to have a 10w-40 E6 and I believe another HDEO 10w-40 option, but those are not available at ordinary retail channels.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: Sunday 40w discussion [Re: Snagglefoot] #5074857 04/14/19 03:52 PM
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ofelas Offline
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I have cold starting temps.

15w40 AME all day long in ambient temps down to roughly -10F/-20F on unaided cold starts on a pre '07 truck.

On my newer trucks, the above temps are handled with CK4 DME 15w40.

I tried a couple fills of 0w40 on various makes; when the temp drops below my above stated low temp cutoffs with 15w40, I tend to fire Webasto coolant heaters up, so I decided to stick with the lower NOACK full synthetic 15w40s.

I Y-d each Webasto coolant heater exhaust- one outlet to the filter head, and the other larger outlet to the side of the sump.



R12 in the summer, Webasto in the winter, and cassette tapes all year.
Re: Sunday 40w discussion [Re: Garak] #5075132 04/14/19 08:18 PM
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FordCapriDriver Offline
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Originally Posted by Garak
Originally Posted by Kamele0N
Manufacturers somehow ban 10w40 grade because it tend to be"sludge monster" some....50+ yrs ago smile

You're also going to have trouble finding a 10w-40 in North America with a modern API diesel spec or an ACEA E specification. The last time I saw an actual 10w-40 HDEO here (not saying they don't exist; I just don't see them anywhere and I've only seen a couple data sheets in the last five or so years) was in the CG-4 days. I know Shell lists a 10w-40 in CJ-4/SM, but I've never seen it in the wild, and Petro-Canada used to have a 10w-40 E6 and I believe another HDEO 10w-40 option, but those are not available at ordinary retail channels.


In Europe Shell has various flavors of 10W-40 HDEO, the top of the line one so to speak being Shell Rimula R6M, but there is also R6 LM, R5 etc.


1975 Ford Capri II Ghia 3000 V6 - Repsol Elite Super 20W-50
1988 Ford Escort XR3i Cabrio - Repsol Elite Super 20W-50

Re: Sunday 40w discussion [Re: Snagglefoot] #5075158 04/14/19 08:55 PM
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Munsy Offline
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New guy here with a 40W question inline with this thread. A lot of you would choose the 15w40 over the 5w40 if low starting temps was not an issue. I’m trying to figure out why that is? Just comparing Rotella T6 in 5w40 and their new 15w40, if it’s summertime use and high temps are say around 100 F, is there a benefit to using the 15w40 oil? I was thinking both of these being 40w would be real similar for summer use. Am I missing something?

Re: Sunday 40w discussion [Re: Munsy] #5075459 04/15/19 07:46 AM
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StevieC Offline
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Originally Posted by Munsy
New guy here with a 40W question inline with this thread. A lot of you would choose the 15w40 over the 5w40 if low starting temps was not an issue. I’m trying to figure out why that is? Just comparing Rotella T6 in 5w40 and their new 15w40, if it’s summertime use and high temps are say around 100 F, is there a benefit to using the 15w40 oil? I was thinking both of these being 40w would be real similar for summer use. Am I missing something?


welcome

The benefit of using a 15w40 instead of a 0w40 is that the 15w40 uses less Viscosity Index Improvers (VII's) so it's less likely to shear. Ideally it's best to keep the gap between the winter rating (W) and the oils weight at operating temperature as close to each other as possible. EG: 15w40 is better than a 5w40 is better than a 0w40 where cold operating temperature permits.

Last edited by StevieC; 04/15/19 07:48 AM.

'18 Caravan - 45k KM - AMSOIL SS 0w20, Fram Ultra, TC-W3 500:1
'06 Santa Fe - 535k KM (Retired)

There is no such thing as "lifetime" fluids! mad
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