Oil ?
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Joined: Aug 2014
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Oil ?
I'm new to the diesel scene but not to the super duty line, I just got rid of an "04" V-10 with 152000 on the clock and I ran full synthetic oil in it from day one. Now I have a "15" 6.7 and trying to get every thing for the oil change and I'm at a loss at what kind of oil I should use? On a diesel does full synthetic make a difference in the long run or should I just stick with the standard oil?
Post Fiend
Joined: Jan 2009
Posts: 6,521
Likes: 11
From: Greenwood, SC
I like rotella T-6 synthetic 5W-40. Main reason is that it's good in all climates I'll ever be in.
15w-40 is really tough in the winter if you're up north. Diesels work a little harder than gassers to start and thinner oil helps a lot.
Some say the synthetic reduces the regen frequency for the dpf but I can't tell.
The T-6 is also a little less expensive than the stock motor craft oil. I think...
15w-40 is really tough in the winter if you're up north. Diesels work a little harder than gassers to start and thinner oil helps a lot.
Some say the synthetic reduces the regen frequency for the dpf but I can't tell.
The T-6 is also a little less expensive than the stock motor craft oil. I think...
Last edited by ruschejj; Jan 4, 2015 at 03:06 PM. Reason: Price
Senior User
Joined: Oct 2008
Posts: 437
Likes: 1
From: Bucyrus, KS
You'll never go wrong running Rotella T6 5w40 I've ran it for years in all my diesels. It's held up well in UOA. I'd run that factory fill oil until the truck tells you to change it. I may just be a weird coincidence but on my 2012 truck I drained the factory fill and replaced with synthetic at 1500 miles. It showed more wear metals throughout it's life than the 13 which I ran the factory fill until it told me to change it the first time then I switched. Not saying it's a huge deal just my experience.
Mountain Pass
Joined: Aug 2014
Posts: 143
Likes: 2
I'm new to the diesel scene but not to the super duty line, I just got rid of an "04" V-10 with 152000 on the clock and I ran full synthetic oil in it from day one. Now I have a "15" 6.7 and trying to get every thing for the oil change and I'm at a loss at what kind of oil I should use? On a diesel does full synthetic make a difference in the long run or should I just stick with the standard oil?
Run motorcraft diesel oil in my '12 ......amazingly have not had an oil related engine failure!!!!
What's even more amazing is I've run motorcraft semi-syn(mostly because it was cheap at wally world)in maybe a dozen modular motors, including a v-10 in a 35' class A, and yet no problems.
Today's Dino oils are more than adequate to protect our motors when factory oci's are followed.
I seem to recall a motorcraft vs rotella comparo on the oil website..... Little to no difference in the OA's.
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Senior User
Joined: Oct 2008
Posts: 437
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From: Bucyrus, KS
Oil threads are fun!!!!
Run motorcraft diesel oil in my '12 ......amazingly have not had an oil related engine failure!!!!
What's even more amazing is I've run motorcraft semi-syn(mostly because it was cheap at wally world)in maybe a dozen modular motors, including a v-10 in a 35' class A, and yet no problems.
Today's Dino oils are more than adequate to protect our motors when factory oci's are followed.
I seem to recall a motorcraft vs rotella comparo on the oil website..... Little to no difference in the OA's.
Run motorcraft diesel oil in my '12 ......amazingly have not had an oil related engine failure!!!!
What's even more amazing is I've run motorcraft semi-syn(mostly because it was cheap at wally world)in maybe a dozen modular motors, including a v-10 in a 35' class A, and yet no problems.
Today's Dino oils are more than adequate to protect our motors when factory oci's are followed.
I seem to recall a motorcraft vs rotella comparo on the oil website..... Little to no difference in the OA's.
I do love these oil discussions though. They are on just about every forum. I think the most particular ones are the TDi forums though. Some of those purists treat you like your dumping sand in your motor if you don't run VW spec.
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Lead Driver
Joined: Dec 2013
Posts: 9,762
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I like T6 - and see nothing wrong with Motorcraft either. I follow the manual and with Extreme use you should go syn and the temperatures I operate it are typically extreme use schedule. I have no special love for shell, it does happen to be one of the cheaper synthetics out there and is available almost everywhere. (Especially in Wal-Mart).
Took me awhile to get used to 7k oil changes too, which is what the computer tells me I should change the oil at. Syn at least makes me feel a little better about it.
Took me awhile to get used to 7k oil changes too, which is what the computer tells me I should change the oil at. Syn at least makes me feel a little better about it.
Fleet Mechanic
Joined: Nov 2005
Posts: 1,899
Likes: 12
From: Upstate NY
Stick with the Motorcraft (and their filters) and you will never have a debate with a 'service' tech that you are using the wrong oil. If you don't have Wally World or other decent DIY access to that oil, then Rotella is the second best choice and always found in farm supply stores (and what I use in my little ISEKI diesel tractor for 25 years).
Debates will rage on as far as change intervals and oils, but the OEM owner's manual is always, IMO, the correct guide regardless.
Debates will rage on as far as change intervals and oils, but the OEM owner's manual is always, IMO, the correct guide regardless.
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