Originally Posted By: NattyBoh
Yeah I understand you.... Just hard to do something against the manufacturer and what they recommend... Granted I have a 6.0, but still has me weary
If it were me and under warranty, I'd be concerned and lean towards the actual approved oil. After warranty, and particularly with an engine that isn't part of the concern here (just part of the extended Ford panic), I wouldn't worry.
Originally Posted By: claluja
Yes, obviously API doesn't care. This was made very clear when Ford repeatedly told API during the CK4 approval process that some CK4s were failing it's tests regarding valve train wear. Ford asked API to break up CK4 into low P and high P categories, since some low phosphorous (P) oils were failing. API told Ford to pound sand, and didn't care one bit.
There are a few things to look at in this vein. First off, why should one OEM's concerns over one engine hold up the entire API regime, and then, subsequently, the ACEA regime, since ACEA E specifications baseline off of API C specifications? No one else had a problem, except Ford with one engine.
Secondly, the CK-4/FA-4 business is complicated enough for ordinary consumers as it is. It doesn't need to be more complicated, just to suit Ford. Also, note, that in effect, Ford does have exactly what you suggest, low P and high P categories. CK-4/SN in ILSAC grades (0w-30, 5w-30, and 10w-30) will have low phosphorus. CK-4/SN in the 40 grades and oils that are solely CK-4 can be high phosphorus, at the oil company's discretion. If high phosphorus Delvac 1 ESP 5w-40 CK-4 only and high phosphorus Rotella T6 5w-40 CK-4 only aren't good enough to address Ford's complaints, then I'm not sure what they really want. In reference to 4WD's post, what does Ford want, a symbol of Calvin urinating on Ram and GMC symbols below the API Donut to reflect Ford approval? If they're not satisfied with CK-4, dump the API regime and rely on builder approvals only. Then they can write whatever requirements they want and be as marginal as they want.
Shell, Mobil, Castrol, Chevron, and even Petro-Canada have all come out with E6 low phosphorus lubes, with all but Shell doing so even under CJ-4. Time moves forward, while Ford is moving backwards.
Like I mentioned, take a look at that list. Shell, Mobil, and Castrol don't have a single 5w-40 example on Ford's list. Chevron hasn't got a single example of any viscosity on the list. Given that the Delvac 1 ESP 5w-40 and the T6 5w-40 retain high phosphorus, and even skipped over the SN specification (which doesn't even matter in 5w-40), and haven't obtained the Ford specification, I would wager that obtaining that specification is very low on the list of priorities of Mobil and Shell. Apparently, it doesn't even show up on Chevron's list of priorities whatsoever.
Userfriendly is right about Ford/FIAT, and you have to watch King of the Hill. It's intentionally flubbed up on the show for comedic effect.