6.7L DIESEL ENGINE OIL - Diesel Forum - TheDieselStop.com
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6.7L Power Stroke Engine and Drivetrain Discussion of the 6.7L Power Stroke diesel engine and drivetrain in the 2011-Up Super Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.7L Power Stroke engine.

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Old 11-30-2010, 07:55 PM   #1 (permalink)
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6.7L DIESEL ENGINE OIL

Ok think i might have messed up. I always ran rotella 15-40 in my 7.3l. I sold it and bought a new 2011 6.7l. I bought a f350 frew cab dually. I just did my first oil change. I have talked to the dealer a few times and the deisel mechanic. He told me to run 10w-30 in my new truck. The book says 10w-30 under normal use. then it says 5w-40 and 15w-40 under extreme conditions. Not sure what they mean buy extreme condition. But I live in the houston Texas area. I pull a 6500 pound tractor about 3 days a week for my side business. I also pull a travel trailer several times a year. So I am not sure what oil to use. I changed it tonight with castrol 10w-30. The book says cj4 or sm. the castrol was sm. So did I screw up. After 60 dollars in oil from walmart and a 22 dollar filter from the dealer. I put it in the truck. What are yalls thoughts and opinions.
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Old 11-30-2010, 08:02 PM   #2 (permalink)
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Have you looked in your owners manual ???- I believe the 5w40 is the best option with low tempartures ( less than - 10F )

You should probably stick with a good "mid range" oil - but you do not need 5 w 40.....
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Old 11-30-2010, 08:10 PM   #3 (permalink)
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Yes I have looked and it recomends 3 diffrent kinds of oil. It says 10w-30 under normal use 15w-40 and 5w-40 unders extreme conditions. Just not sure what they mean buy extreme conditions. they also say if you tow more than a 1000 miles. but who knows. In my 7.3l i used 15w-40. and I got 313330 miles on it.
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Old 11-30-2010, 08:23 PM   #4 (permalink)
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I would dump the Castrol if it is only a SM oil and go get a cj4 oil asap. Seeing that you like Rotella get some in a 10w-30 weight but looking at your towing I might go for some Rotella T-6 5w-40.
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Old 11-30-2010, 08:31 PM   #5 (permalink)
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Ok I wonder where I can get that t6 5w-40 because all I ever see is the 15w-40. Kinda hard dumping 60 dollars in new motor oil. Could it hurt it if i run it until the next oil change
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Old 11-30-2010, 08:41 PM   #6 (permalink)
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Pulling a few" light loads" a week in Houston- is far from "extreme duty" although it may seem so ---- use the 10w30 and you are good to go

No you didnt mess up

Last edited by trails2004; 11-30-2010 at 08:45 PM.
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Old 11-30-2010, 08:46 PM   #7 (permalink)
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Right 7500 plus a the trailer is lite. So stick with the sm oil or go with the cj-4.
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Old 11-30-2010, 08:47 PM   #8 (permalink)
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I would dump the Castrol if it is only a SM oil and go get a cj4 oil asap. Seeing that you like Rotella get some in a 10w-30 weight but looking at your towing I might go for some Rotella T-6 5w-40.
X2. Oils rated only with an S followed by another letter (M in this case) are for spark ignition (gasoline) engines only. Oils with a C rating followed by another letter (J is the latest for diesel oils) can be used compression ignition (diesel) engines. If you put only SM oil in there, I'd get it out right away.
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Old 11-30-2010, 09:12 PM   #9 (permalink)
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I get my rotella t6 5w40 at walmart. 19.50 per gallon jug.
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Old 11-30-2010, 09:14 PM   #10 (permalink)
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Check this link out.

CJ-4 Service Category Description
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Old 11-30-2010, 09:21 PM   #11 (permalink)
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Quote:
Originally Posted by 4yeagers View Post
Ok I wonder where I can get that t6 5w-40 because all I ever see is the 15w-40. Kinda hard dumping 60 dollars in new motor oil. Could it hurt it if i run it until the next oil change

If you used Castrol GTX it is rated SM only and is for gas engines. You can use 10w30 but it should be CJ rated for diesels. Walmart sells Rotella T6 5w40 Synthetic CJ rated for $19.00 gal in Fla. They also have Motorcraft 10w30 Heavy Duty which is rated CJ, don't remember the price, but I think it comes in a 5 qt. jug. If you live where it gets cold get 5w40 your truck will thank you.
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Old 11-30-2010, 10:53 PM   #12 (permalink)
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the other dumb question I have is why do the put sm in the owners manaul and the oil cap.
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Old 12-01-2010, 12:02 AM   #13 (permalink)
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Q: the other dumb question I have is why do the put sm in the owners manaul and the oil cap.

A: It can be used in a "worst case" scenario for a short interval.


"Kinda hard dumping 60 dollars in new motor oil."

A: I had to dump $100+ worth (oil is more expensive up here!) of full synthetic PAO 0W-30 when my injector took a crap 200 miles in! I did reuse the filter to save me some $$$. It just bites us in the a$$ every once in a while, plus if there was an oil related failure Ford will have more questions about your choice of oil. IMO it is not worth the chance when oil is cheap compared to a new 6.7.
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Old 12-01-2010, 05:38 AM   #14 (permalink)
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Quote:
....Not sure what they mean buy extreme condition. But I live in the houston Texas area. I pull a 6500 pound tractor about 3 days a week for my side business. I also pull a travel trailer several times a year. So I am not sure what oil to use......
Here you go!


Engine lubrication for severe service operation
The following conditions define severe operation for which engine
operation with SAE 5W-40 API CJ-4 is recommended. Oil and oil filter
change intervals will be determined by the Intelligent Oil Life Monitor™
as noted previously.
• frequent or extended idling (over 10 minutes per hour of normal
driving)
• low-speed operation/stationary use
• if vehicle is operated in sustained ambient temperatures below -10°F
(-23°C) or above 100°F (38°C)
• frequent low-speed operation, consistent heavy traffic less than
25 mph (40 km/h)
• operating in severe dust conditions
• operating the vehicle off road
• towing a trailer over 1,000 miles (1,600 km)
• sustained, high-speed driving at Gross Vehicle Weight Rating
(maximum loaded weight for vehicle operation)
• use of fuels with sulfur content other than ultra-low sulfur diesel
(ULSD)
• use of high-sulfur diesel fuel

Maintenance and Specifications
45
2011 Diesel (eco)
Supplement, 5th Printing
USA (fus)

http://www.motorcraftservice.com/pub.../1160l6d5e.pdf
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Old 12-01-2010, 09:17 AM   #15 (permalink)
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Call ford support and ask them if sm is ok. The phone number is in the owners manual.
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