With the apparent recent Ford spec WSS-M2C171-F1 and warnings against any CK-4 oils, it seems I can no longer use the Mobil1 5W40TD that I used to use in my 6.4. I did use some old stock CJ-4 M1 I had for the last change, but I need to find something suitable for the next change.
The list of approved oils on the Motorcraft site ( Motorcraft ) has a lot of obscure brands it seems and a quite small section for 5W40 which is what I'd want for my hot and dusty area here in TX.
Thoughts?
The list of approved oils on the Motorcraft site ( Motorcraft ) has a lot of obscure brands it seems and a quite small section for 5W40 which is what I'd want for my hot and dusty area here in TX.
Thoughts?