Wrong Viscosity
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Senior User
Joined: Oct 2017
Posts: 235
Likes: 2
Wrong Viscosity
In a hurry, bought 15w40 when I should have bought 5w40. Changing it out today but the question is, will leaving the oil that's in the filter be ok, or just suck it up and drain it too and buy a new filter?
Thanks!
Thanks!
Prolocutor
Joined: Jan 2009
Posts: 13,618
Likes: 1,245
From: Western MA
15W40 is fine for your 6.7 and there are more approved 15W40 oils on Ford's approved list than any other weight.
https://www.fcsdchemicalsandlubrican...SSM2C171F1.pdf
If it were me, I'd leave it and go to 5W40 on your next change if so desired.
https://www.fcsdchemicalsandlubrican...SSM2C171F1.pdf
If it were me, I'd leave it and go to 5W40 on your next change if so desired.
Elder User
Joined: Mar 2017
Posts: 764
Likes: 30
OMG don't waste that oil!
Leave it in there and get the use out of it for the duration of the IOLM.
15w-40 is not a "wrong" viscosity. It's an approved vis on Ford's list.
I understand it's not the one you may have wanted, but for goodness sake don't fall victim to the internet hype about syns and vis.
Use it to it's full potential; run out the IOLM.
Leave it in there and get the use out of it for the duration of the IOLM.
15w-40 is not a "wrong" viscosity. It's an approved vis on Ford's list.
I understand it's not the one you may have wanted, but for goodness sake don't fall victim to the internet hype about syns and vis.
Use it to it's full potential; run out the IOLM.
Cargo Master
Joined: Jan 2004
Posts: 2,419
Likes: 694
From: Minnesota
15 is a little heavy for those temps for sure. And it is going to get colder.
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Senior User
Joined: Aug 2016
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Lie was posted above, don't sweat it. Run it. I live in Colorado also and would run it in a heartbeat.
Sam
Sam
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Laughing Gas
Joined: Jun 2018
Posts: 939
Likes: 8
From: DFW
Drain it and replace it you will sleep better and not think about it again. Always tightwads who will drive 10 miles to save a dime on something. Bottom line if it bothers you replace it-----I would if it bothered me...
FTE Community Team
Joined: Mar 2017
Posts: 3,337
Likes: 1,050
From: Florida
^^^^^. What Dave said. Drain the 15W40 and put in a 5W40. You will sleep better, I know I would if I were in Colorado..
Now if you were here in Florida I’d say not a big deal.
Prolocutor
Joined: Jan 2009
Posts: 13,618
Likes: 1,245
From: Western MA
I don't think it's fair to call someone a tight wad because they don't worry about the same things as you. (Me, I spend money like a drunken sailor...) I think it's more of a, "what concerns the individual" situation. Personally, being in CO in winter with 15W40 oil would't worry me. However, there are things that would worry me and not someone else.
Laughing Gas
Joined: Jun 2018
Posts: 939
Likes: 8
From: DFW
OK maybe tightwad wad is strong for some BUT I personally know people who are like that and who have done that they had oil for another vehicle they traded and refused to not use it. Was a corvette C7 but still kind of the same thing.
Tuned
Joined: Jan 2010
Posts: 419
Likes: 3
15w-40w oil is fine in diesels for most of Colorado. Most people think we all live up in the mountains. The truth is the majority of us live either on the western slope of the Rockies or out on the plains (e.g. Denver, Ft Collins, Greeley, etc). While it can get cold here at times, it's not like living up in the Dakotas or Minnesota.
FTE Community Team
Joined: Mar 2017
Posts: 3,337
Likes: 1,050
From: Florida
