Good bye Shell Rotella
Unless I'm missing something...After using Shell Rotella oil's since the early 80's I just returned a case of Rotella of T-6 full synthetic for a case of Motorcraft oil for my 6.7 Powerstroke. Seems ...
Forum Discussion
FishOnOne wrote:
Here's video on the CJ4 vs CK4 oil. The valve train wear test was removed from the CK4 oil specification which is the area I believe Ford was concerned about.
Link1
Link2
Worthwhile videos. They did gloss over the fact that Ford says any diesel engine OLD OR NEW, and not just late model 6.7 engines.
Also note that the 6.7 has a roller tappet cam, not flat tappets that the old wear test considered. My opinion is that the removal of the most apparent point of wear from the test was just a slight of hand to mask the real problem. However the flat tappet test is still valid in comparing oils for their ability to prevent wear and should be used.
