Oil Type
Thread Starter
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More Turbo
Joined: Feb 2011
Posts: 531
Likes: 0
From: Atlanta, Georgia
Oil Type
Gents,
I was wondering if someone could give me the pros and cons of switching to 5w-40 oil instead of the 15w-40? Just trying to see if it would benefit me at all, let me know if more information may be needed.
I was wondering if someone could give me the pros and cons of switching to 5w-40 oil instead of the 15w-40? Just trying to see if it would benefit me at all, let me know if more information may be needed.
Elder User
Joined: May 2010
Posts: 520
Likes: 1
From: Alabama
I use Rotella T6 5w-40. My injectors seem to be quiter than with 15w-40 an I noticed my oil temps went down. I don't have the factory oil cooler, I have a IPR Research oil cooler which has bigger coolant passages. So my oil temps run higher. Oil temp of 217 an coolant temp of 190. Once I changed to the 5w-40 my oil temp went down to the 207 to 210 range.
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
I use Rotella T6 5w-40. My injectors seem to be quiter than with 15w-40 an I noticed my oil temps went down. I don't have the factory oil cooler, I have a IPR Research oil cooler which has bigger coolant passages. So my oil temps run higher. Oil temp of 217 an coolant temp of 190. Once I changed to the 5w-40 my oil temp went down to the 207 to 210 range.
Lead Driver
Joined: Feb 2005
Posts: 7,906
Likes: 2,625
From: The Great State of Texas
Here's my experience with synthetic 5W40 vs conventional 15W40 in our beloved 6.0 psd
Synthetic:
Pro's
1. Easier cold starts
2. Fuel mileage increased ~ .5mpg
Cons
1. Created oil leaks (big problem for me, but to others maybe not a big deal).
2. Injectors would get noisy at ~ 4k miles ( subjectional)
3. Increased cost
I currently have 160k + miles and I have all 8 original injectors and turbo running 99% 15W40 conventional oil
I do not believe (In a 6.0 psd application):
1. Synthetic oil prevents turbo oil coking better than conventional
2. Synthetic oil increases the life of the injectors better than conventional
Synthetic:
Pro's
1. Easier cold starts
2. Fuel mileage increased ~ .5mpg
Cons
1. Created oil leaks (big problem for me, but to others maybe not a big deal).
2. Injectors would get noisy at ~ 4k miles ( subjectional)
3. Increased cost
I currently have 160k + miles and I have all 8 original injectors and turbo running 99% 15W40 conventional oil
I do not believe (In a 6.0 psd application):
1. Synthetic oil prevents turbo oil coking better than conventional
2. Synthetic oil increases the life of the injectors better than conventional
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Elder User
Joined: Sep 2010
Posts: 777
Likes: 6
From: Florida
I use the least expensive (name brand) 15W40 I can find. Unfortunately Walmart usually has the best deal
Last edited by Major Marvin; Jan 9, 2012 at 07:19 PM. Reason: name brand
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Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
There are very good 15w-40 oils. The only reason I see to switch to a synthetic 5w-40 is if you are having bad cold starts or want to extend you oil change intervals. The latter really isn't an option since the 6.0L will shear all oils (even synthetics) down to a 30w in about 5k miles.
If you don't need to improve your cold starts, save your money and go with a good 15w-40.
Thread Starter
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More Turbo
Joined: Feb 2011
Posts: 531
Likes: 0
From: Atlanta, Georgia
Ok this is defnitely good information. i do not have a real need to improve cold starts. I do have some sticky injectors but the Rev-X has helped greatly with that I would say. I do live in Atlanta so it never gets that cold, maybe a 20 degree morning is about the lowest I would see here...
Thread Starter
|
More Turbo
Joined: Feb 2011
Posts: 531
Likes: 0
From: Atlanta, Georgia
Here's my experience with synthetic 5W40 vs conventional 15W40 in our beloved 6.0 psd
Synthetic:
Pro's
1. Easier cold starts
2. Fuel mileage increased ~ .5mpg
Cons
1. Created oil leaks (big problem for me, but to others maybe not a big deal).
2. Injectors would get noisy at ~ 4k miles ( subjectional)
3. Increased cost
I currently have 160k + miles and I have all 8 original injectors and turbo.
I do not believe (In a 6.0 psd application):
1. Synthetic oil prevents turbo oil coking better than conventional
2. Synthetic oil increases the life of the injectors better than conventional
Synthetic:
Pro's
1. Easier cold starts
2. Fuel mileage increased ~ .5mpg
Cons
1. Created oil leaks (big problem for me, but to others maybe not a big deal).
2. Injectors would get noisy at ~ 4k miles ( subjectional)
3. Increased cost
I currently have 160k + miles and I have all 8 original injectors and turbo.
I do not believe (In a 6.0 psd application):
1. Synthetic oil prevents turbo oil coking better than conventional
2. Synthetic oil increases the life of the injectors better than conventional
Lead Driver
Joined: Feb 2005
Posts: 7,906
Likes: 2,625
From: The Great State of Texas
I'm running Mobil Delvac 1300 15W 40
Couple things I like about the Delvac:
1. optimized baseoil technology containing severely hydroprocessed base stocks (Synthetic oil)
2. patented Trimer* additive technology (aka trinuclear moly)
Couple things I like about the Delvac:
1. optimized baseoil technology containing severely hydroprocessed base stocks (Synthetic oil)
2. patented Trimer* additive technology (aka trinuclear moly)
Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
Ok this is defnitely good information. i do not have a real need to improve cold starts. I do have some sticky injectors but the Rev-X has helped greatly with that I would say. I do live in Atlanta so it never gets that cold, maybe a 20 degree morning is about the lowest I would see here...
More Turbo
Joined: Aug 2009
Posts: 551
Likes: 19
10w-30 is an option that isn't mentioned nearly as often as it should be. I use it year around with excellent results. 141,xxx mi. with 7,500 OCI's, original injectors and I have never experienced stiction. The kicker its about half of the price of a syn.