Oil and Filter
Hotshot
Joined: Oct 2015
Posts: 19,722
Likes: 12,867
From: Wyoming
If your truck doesn't see severe service then by all means go dino oil. There is no reason to spend the extra money for synthetic.
Mountain Pass
Joined: Nov 2005
Posts: 162
Likes: 0
From: Las Cruces, NM
I tow a trailer that is about 14,500 pounds about 10,000 miles a year, through all terrains and heats. I don't go to cold weather. Last summer, I was in your neck of the woods--Colorado Springs and La Veta, as well as Estes Park, Little Big Horn, Rapid City, SD, and other places.
My Ford dealer says this is the oil to use. I told him I wanted 10w-40, but he said that I should stay with the 10w-30. I haven't seen the oil temp go quite as high as yours, though. The only problem I've had with altitude and heat has been with the DPF (diesel particulate filter), but that was taken care of with a software upgrade.
Who knows what is adequate and what is overkill? I guess we'll see in the long run. I ran a Duramax for 150,000 miles on Rotella 15w-40 (dino) and never had a problem with it. I changed it, too, every 5000 miles.
My Ford dealer says this is the oil to use. I told him I wanted 10w-40, but he said that I should stay with the 10w-30. I haven't seen the oil temp go quite as high as yours, though. The only problem I've had with altitude and heat has been with the DPF (diesel particulate filter), but that was taken care of with a software upgrade.
Who knows what is adequate and what is overkill? I guess we'll see in the long run. I ran a Duramax for 150,000 miles on Rotella 15w-40 (dino) and never had a problem with it. I changed it, too, every 5000 miles.
Fleet Mechanic
Joined: Aug 2017
Posts: 1,274
Likes: 26
From: St Louis Suburbs
I just picked up a 2017 6.7 Lariat. I have done UOA on my vehicles for the past 10 years. Very much looking forward to pulling the first oil from this engine and seeing what the results are. Probably changing it at 2,500 miles. Going to use AMSOIL Signature Series 5w40 for the first oil change.
Laughing Gas
Joined: Oct 2014
Posts: 962
Likes: 114
From: Middle TN
yes, very cool. That is the set up a lot of us Rotella t6 guys are doing since t6 does not have the CK blessing from Ford yet. Make sure it is the premium blue EXTREME meeting Ford's new in house spec
Laughing Gas
Joined: Oct 2014
Posts: 962
Likes: 114
From: Middle TN
That's it. It should have "meets ford spec wss-m2c171-f1" on the back of the bottle. If the new bottles don't have it, it is on the list of Ford approved oils.
The list is on my phone, I can't seem to copy it here, if you search this site for CK oils meeting Ford approved spec, it's been posted here a few times.
The list is on my phone, I can't seem to copy it here, if you search this site for CK oils meeting Ford approved spec, it's been posted here a few times.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Fleet Mechanic
Joined: Aug 2017
Posts: 1,274
Likes: 26
From: St Louis Suburbs
I've had a ton of success with Amsoil. This oil says it meets Fords new spec. My plan is to run it 5000 miles and then do another oil analysis. My guess is it will work out pretty good.
6.7 Weight Loss
Joined: Jun 2017
Posts: 1,141
Likes: 5
From: Woodbury CT
Whatever you choose be sure of 2 things 1) it's on the Ford approved list and 2) it's fully synthetic. Any questions on it being dino or synthetic spend a few hours reading this -- http://motoroilbible.com/free-mob.pdf - gotta get past the dudes disclaimers but once you get into the meat of the report you'll have a fairly decent understanding of oil and will be comfortable with whatever choice you make