Is there a main reason why you are considering a different oil weight? Is the stock not 5W-30?
Ford Motor Company CK-4/FA-4 Ford Position Statement
On December 1, 2016, the American Petroleum Institute (API) began licensing two new diesel
motor categories CK-4 and FA-4. API CK-4 was released to replace CJ-4. API FA-4 is a low
dynamic viscosity diesel oil released for diesel engines designed for the lower dynamic viscosity
Ford is now recommending FA-4 motor oil in its smaller diesel engines. FA-4 is recommended
for servicing the F-150 with the 3.0L diesel engine and the Transit with the 2.0L diesel engine.
Ford still recommends against using FA-4 oils in larger Ford diesel engines, like the 3.2L and
6.7L diesel engines, as well as older Ford diesel engines.
Ford continues to recommend motor oils meeting the Ford specification WSS-M2C171-F1
instead of CK-4 motor oils in the 3.2L and 6.7L Ford diesel engines as well as older Ford diesel
engines, 4.5L, 6.0L, 6.4L, and 7.3L. Testing completed on some CK-4 type formulations have
shown inadequate wear protection compared to CJ-4 formulations developed and licensed
before 2016. Therefore, Ford has included additional requirements beyond CK-4 in WSS-
M2C171-F1 to provide additional wear protection. Like many other diesel engine
manufacturers, with their own internal OEM specification, Ford is recommending oils that meet,
Ford Material Engineering Specification WSS-M2C171-F1. The customer should use an oil that
meets this specification. A list of motor oils meeting this specification are shown on the
Motorcraft website under the Motor Oil tab on http://www.fcsdchemicalsandlubricants.com/main/
To ensure you protect your Ford diesel engines use an oil meeting Ford specification
WSS-M2C171-F1 like Motorcraft Super Duty Motor oil or API FA-4 like Motorcraft F-150 Diesel
Motor Oil. Please consult your owner guide for the proper application.
So I played in a monthly home poker game last Friday night, and one of the regular players is a PowerStroke Diesel mechanic at the local Ford dealer, and the oil you are thinking about using is what his recommendation was when I asked him about oil, so I think you have selected well.What oil are you guys using?
I was thinking about using Rotella T6 5w40. According to manual should be OK.
I got my first oil change about 6 weeks ago. The dealer didn't have the filter or oil in stock. It took them 3 hours to track both down in the Denver distribution center.Just saying... that Ford has a special blend of Motorcraft oil with the F150 Diesel label on it. It was designed for the special lubrication requirements of the 3.0 Power Stroke Diesel. The oil is sold in two different viscosity's. One is the 5w30 for the colder temperatures and one is a 10w30 for the warmer climates.
I will be checking if my Ford Garage is using this oil for my first oil change. I would not be surprised that some dealers had not yet stocked the new oil. The Ford Video that I viewed stated that the oil used for the 6.7 should not be used for the 3.0 and vis versa.
Check out the Ford Video on you tube
Motorcraft® F-150 Diesel Motor Oil
Post a picture of the big red circle. Also that big red circle could just mean its not recommended/optimal, but not necessarily unsupported as the manual and several other guides clearly state T6 5w-40 (or equivalent) is supported.Google it.
There are Ford Tech talks on Youtube that seem to be published by Ford. They have a big don't do it circle around WSS-M2C171-F1....
My dealer said I should be very careful about the oil I let other auto mechanics put in the engine. He said, most don't mechanics know yet.. The wrong oil will void the warranty.