FROM:
https://www.fcsdchemicalsandlubricants.c...20Statement.pdf
Updated Ford Motor Company CK-4/FA-4 Ford Position
Statement
Due to Ford Motor Company’s commitment to continuous improvement, Ford will keep
our customer informed of changes to this situation
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. FA-4 is
a low viscosity diesel oil released for diesel engines designed for a lower viscosity oil.
API FA-4
Due to its low viscosity FA-4 should not be used in any Ford diesel vehicles at this time.
API CK-4
Ford will not be recommending the use of CK-4 motor oils in any Ford diesel engines,
new or old. Ford testing has shown some CK-4 type formulations have shown
inadequate wear protection compared to CJ-4 formulations developed and licensed
before 2016.
Ford now recommends using oils that meet our OEM specification, Ford Material
Engineering Specification WSS-M2C171-F1. Similar to many other diesel engine
manufacturers who also only recommend oils meeting their own OEM specifications.
WSS-M2C171-F1 contains all the requirements of CK-4 with additional Ford
requirements for added engine protection. The customer should use an oil that meets
this Ford specification for a short period of time an oil showing CJ-4 in the API donut, without showing CK-4,
would be acceptable for service even if not showing WSS-M2C171-F1. This oil would
most likely be an older CJ-4 formulation, developed and licensed prior to 2016. Years of
experience and Ford testing has shown that these older CJ-4 formulations provide the
necessary engine protection in all Ford diesel engines where CJ-4 and older C
categories are recommended. Some of these CJ-4 oils could be available for up to a
year after December 1, 2016.
To insure you protect your Ford diesel engine use Motorcraft Super Duty Motor meeting
API CJ-4. A Motorcraft Super Duty Motor meeting WSS-M2C171-F1 will be available 1st
quarter 2017. Check this Motorcraft website for diesel motor oils approved by Ford
Motor Company for servicing Ford diesel engines;
https://www.fcsdchemicalsandlubricants.com/main/category.asp?select=%5BMotor%20
Oil%5D
Extra Precaution
The customer should not use oils labeled CK-4/SN unless they have been approved by
Ford Motor Company to meet WSS-M2C171-F1. This is possible with SAE 10W-40,
15W-40, 5W-40 and 0W-40 oils. At this time SAE 10W-30 oils showing CK-4/SN cannot
meet WSS-M2C171-F1 and should be avoided. So if unsure avoid CK-4 oils that also
shows SN in the API donut.
AND NEVER use C category oils in gasoline engines with emissions catalysts, even if
they show SN in the API donut, like CK-4/SN, CJ-4/SN, etc, UNLESS they also show the
Starburst symbol on the front label stating “American Petroleum Institute Certified for
Gasoline Engines”. SN oils without a Starburst symbol can be harmful to your vehicles
catalyst and reduce fuel economy.