Ordered a 2019 F-350 with the 6.7 diesel. Trading my Triton V-10 gas.I always used Valvoline. Never had an oil issue.Never had a diesel. There are several brands of oil out there You guys are the experts. What oil do you use?. Is synthetic my only choice?Thanks in advanceAL

If you like Valvoline products, Premium Blue Extreme 5W40 is a good choice like 2naEagle uses. Also Rotella T6 5W40 is another good choice.I would not use Delo and Delvac since they're both dual rated for gas and diesel engines and have reduced Zinc and Phosphorous anti wear additives.

I use Rotella. Your owners manual will give you some idea based on what you plan to do with it.

Which diesel engine oil. | Good Sam Community

buc1980
Explorer
Apr 21, 2019
Shell rotela T6 5w-40 synthetic.
hondapro
Explorer
Apr 20, 2019
I use the Motorcraft 5w-40 in mine
Dave_H_M
Explorer II
Apr 19, 2019
I do like BB TX.
blt2ski
Moderator
Apr 19, 2019
Been using Delo since around 1988 for ALL of the diesels I have. Be them 2, 3, 4 or V8's! Got some Rosmella with the boat. Did not believe the rosmella name, now I know why its called that. Served original owner of boat for 20 years, boat is still going strong 35 years later!
As noted, get something that meets spec! If you are on the road, and you need oil, version you like is not available, add what ever flavor is. Have not had issues with any gas or diesel adding a quart of a different brand!

Your money, not mine!

marty
Ron3rd
Explorer III
Apr 18, 2019
transferred wrote:
Shell T6 Rotella 5W40 for my diesels.

Hard to beat that one.
transferred
Explorer
Apr 18, 2019
Shell T6 Rotella 5W40 for my diesels.
Ron3rd
Explorer III
Apr 17, 2019
FishOnOne wrote:
Sport45 wrote:
Any CJ oil that’s not also CK rated is okay as long as it meets viscosity spec. CK oils need to meet the Ford lubrication spec. You can see Ford’s position statement and a list of approved brands in the link below. I don’t think Delo or Valvoline are listed at this time.

Ford Diesel Oil

Valvoline is on the list, but delo and delvac are not which is why I didn't recommend them.

The bottom line is to use an oil that meets Ford specs.

I use Delo 400 SDE that goes on sale for $28 for three 1 gallon jugs. It meets Cummin's specs but not Ford's. Delo 400 is API CK-4/SN which they claim in their marketing that it provides up to 50% better wear protection than API CJ-4. Ford recommends CJ-4 and not CK-4/SN for some reason, so go figure.

Looks like your choices mostly come down to one of the Rotella oils or Motorcraft.
FishOnOne
Nomad
Apr 17, 2019
Sport45 wrote:
Any CJ oil that’s not also CK rated is okay as long as it meets viscosity spec. CK oils need to meet the Ford lubrication spec. You can see Ford’s position statement and a list of approved brands in the link below. I don’t think Delo or Valvoline are listed at this time.

Ford Diesel Oil

Valvoline is on the list, but delo and delvac are not which is why I didn't recommend them.
Sport45
Explorer II
Apr 17, 2019
Any CJ oil that’s not also CK rated is okay as long as it meets viscosity spec. CK oils need to meet the Ford lubrication spec. You can see Ford’s position statement and a list of approved brands in the link below. I don’t think Delo or Valvoline are listed at this time.

Ford Diesel Oil
ppine
Explorer II
Apr 17, 2019
Rotella is good stuff. I like synthetic in the diesel. Makes for easier winter starting and lasts a long time. It does not wear out.