Originally Posted By: Garak
That may be, but there still was a Kubota panic at CJ-4 rollout, not to mention the general panic. When the first Powerstrokes came out, CJ-4 was years away yet. What, specifically, in CK-4 is not optimal for your older trucks?
Even when the 7.3 Powerstroke came out, Ford found something to panic about with respect to contemporary HDEOs. Wakefield, Chevron, Petro-Canada, Mobil, Esso, and Shell all knew nothing about making an HDEO, to hear Ford tell it back then, too, unless it had a Motorcraft label on it. Whoever made that oil at the time apparently knew what they were doing, but forgot the procedure when working on other product lines.
Dodge up here is giving away a free Cummins upgrade to people buying a new Dodge 2500 or 3500. Ford is telling us that most off the shelf HDEOs are incompatible with a new Ford diesel truck, and even their old ones, perplexingly. That's a great way to compete with Dodge right now.
And Ford doesn't have an issue with all CK-4 oils. There are many on the current Ford approved list in both 10w30 and 15w40 varieties.
Yeah, the CI-4+ was in response to EGR, and CJ-4 in response to DPF's. Now CK-4 is also for protection of emissions treatment systems along with the current trend to down speeding heavy diesel engines and the increased heat internally from doing so. Supposedly better oxidation control.