rfrazier,
Sir, I appreciate your dedication with trying to show the qualities and benefits of the JD oils. And I agree with you that they are very fine oils. The issue we cannot seem to agree on it whether the oil is API licensed. I am sorry but your links provide no information to verify the JD Plus 50 15w40 is API licensed.
From your link:
"It is an exclusive John Deere formula that meets or exceeds the current industry requirements and can be highly recommended for use in all engines requiring oil with API service classifications of CI-4, CH-4, CG-4, CF-4, CE, and CD. "
Go to the Amsoil site, you will see the same wording there, and the majority of Amsoil products are not API licensed. This is a widely known FACT.
The key words are meets or exceeds. The JD oils is not API licensed even though in JD's own test they found it to out perform oils that are CH-4. Some could argue these test are biased? Do I personally think they are lying? NO.
I don't care if you use API licensed oils or not? I don't care that JD says their oils meet or exceed API specs (hell, I'm sure they do), I even said I think the Plus 50 15w40 is a good oil, I'll even go a far as to say that in my opinion it appears to be better than Rotella (by looking at the spec sheet alone). This does not hide the fact that JD Plus 50 15w40 IS NOT licensed with the API.
rfrazier,
You seem to think I am a cheerleader for API oils or that API oils are the only ones that should be used in a Cummins. I already stated I use a oil that is not API licensed. The bottle of my oil of choice also states that it meets or exceeds CI-4 specs. Obviously I belilve them or I wouldn't be using this oil. Unfotunately, meets or exceeds by the company own testing does not mean that it is API licensed.
I will finish once again with, I am simply trying to point out a FACT that JD oils are not licensed with the API. There are some people on this forum who care about this and some of the same people will not use Amsoil because it is not API licensed.
I think there is enough information for the readers of this thread to make their own decision about the quality of the JD oils and whether or not they feel comfortable using them in their own application.
I guess we will have to agree to disagee.
Note: I am awaiting a return phone call from a marketing and distributution manager at JD. When I hear from him I will post the additional information.