Well, if anyone is concerned they got some mislabeled T6 ck4 instead of cj4, easy to remedy the situation.

Lucas TB Zinc-Plus Engine Break-In Oil Additive

Add 1 bottle to your engine when doing an oil change. That should make it at least on par with the zinc/antiwear levels of cj-4.

My recommendation is to take a full gallon oil jug (t6 ck-4,,?) and fill up your 1 qt oil filter, then pour in the 16 oz zinc plus additive into the gallon jug and give it a shake or 2. Then just do a regular oil change using it.
Now you're an oil blender,,,

I've used this zinc/phos additive for older engine rebuilds very successfully. Big blocks/small blocks, exotics, etc, with heavy valve springs and big cams with new formulation oils. It works, good.

Be careful if using other oil additives, some are good, some not so much. All 'zinc' is not created equally...

jmo

 

From Chevron:

Need more time before you switch to CK-4 motor oils?


Dear Donald,
Many oil suppliers have begun moving their entire product lines to the newly licensed CK-4 and FA-4 oils. At Chevron, we realize some engine OEMs are not mandating an immediate change to these new oils, especially in off-highway applications. That is why we've decided to keep our Delo® 400 LE 15W40 CJ-4 product available for an extended period to give you more time to make the change.
To learn about more about Delo 400 LE 15W 40 and our newest engine oils, check out the Delo 400 Advanced Heavy Duty Engine Oils Transition Guide. You’ll find details around performance characteristics, benefits and applications of the next-generation Delo 400 oils.
When you’re ready we’re ready. Call (800) 582-3835 for more information.
Best regards,
Rommel Atienza
Chevron Lubricants Brand Manager

 

So has anyone contacted Ford to ask why Motorcraft is not on the approved oil list?

 

shell is on the approved list now ford updated it list in aug.