I'm trying to find the copy of the letter now, I seen it yesterday on a PSD forum and came straight from Ford, apparently its being sent to newer truck owners with the 6.7 PSD. It clearly states that Ford does not approve the use of the new CK-4 oils in their diesels. It says you must now use the older CJ-4 stuff of stuff that adheres to a specific Ford spec. in order to stay within warranty. The letter clearly mentions lack of anti-wear properties in these new oils. Have any of you PSD owners got this letter?
Very curious as I'm about to do a winter OCI in my 05 PSD and was going to use some of the new oils in the 10W30 variety.
Very curious as I'm about to do a winter OCI in my 05 PSD and was going to use some of the new oils in the 10W30 variety.