Must be a CA thing. Arround here you can just about get CI-4+ in anything you want. You just have to buy it in 5gal or 55gal drums.
I'm going to add that I believe CJ-4 oil is enough differant from CI-4 oil that they should not be interchangable. You shouldn't use CI-4 oil in a motor that uses a dpf for the posibility of the heavy phosphates and zinc additives stopping things up. You also shouldn't be putting CJ-4 oil in heavy equipment or highway diesels made earlier than 07 taking a chance on premature wear from inadequate additives.
CJ-4 oil isn't backwards compatable and should have only the CJ-4 lable on it and no others.
WCounts - agree with you on ALL-counts . . . . with the exception of your
last sentence (CJ not being backwards compatible)
Just happen to have a quart of Delo 400 15w-40 LE ("formulated for API
service CJ-4")
"CJ-4 Compatabile with API services Classification/Compatible API services
CI-4 Plus, CI-4, CH-4, CF. "
And a gallon of Valvoline Classic Blue:
"Exceeds API Services CJ-4, CI-4, CH-4, CF/SL"
Same thing on the "donut" - with CJ-4 on top with the other service/s and
CI-4 Plus alone on the bottom.
That's backwards compatible!! - and NOT "stand alone" CJ.
Check the previous issues (54-58) of TDR quarterly. (it goes on and on).
Too bad the initial testing was with a majority of CI oils and only a few CJ.
Amsoilman - you are correct. Some industry folks admit that the CJ oils
will catch up, but lots say it hasn't happened yet.
Lots of well informed discussion on "Bob Is The Oil Guy" forum/s.
(They like to call it "rearwards compatible").
I don't lose any sleep over using CJ -
(that's why I have the gal of Valvoline CJ, LOL!),
but since I have an '05, I have no desire to run the CJ if I can help it.
Kinda like using Windows Vista when it first came out.
JC