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.
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.
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.
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.
2008 Chevy Avalanche Z-71
2012 GMC Sierra 2500 HD Denali Duramax
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.
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.
2005 Excursion Limited 6.0 4X4
Swamps 58V, PHP tuned FICM
SCT tunes by Quick Tricks
Sinister EGR Delete
6.4 banjo bolts
Ford fuel pressure spring kit
Excursion High Idle Mod
Cat EC-1 coolant and a Sinister coolant filtration kit
Magnaflow Turbo Back with muffler
Retro-Solution Digital HID
....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
• 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
• use of high-sulfur diesel fuel
Maintenance and Specifications
2011 Diesel (eco)
Supplement, 5th Printing