API CJ-4 oil in a 2004??

huntercgr · #1 (**permalink**) 04-27-2008, 06:30 PM

I've been a bit out of the loop, and I've tried some searches to no avail. I haven't found anything definitive that says it's OK to use this oil in the 2004 6.0. Anyone?

duffman77 · #2 (**permalink**) 04-27-2008, 06:50 PM

CJ-4 is the latest spec and is backwards compatable. Its the good stuff.

6.0 Rules · #3 (**permalink**) 04-27-2008, 07:52 PM

I switched to it about 6k miles ago because of recommended use for towing with 15/40w oil. I have an '03 with 125k miles and tow a 12k# 5th wheel during spring, summer and fall. I will opt for the Rotella 5/40w synthetic during winter because I had sluggish starts with the 15/40w Delo CJ-4 oil when the temps got below 30°f last winter, and I don't tow during the winter months. I have to say that the truck really seemed to pull better with the CJ-4 oil. The only drawback is start ups when the engine is cool, it is a little more sluggish, but starts right up and runs fine after she warms up. Hope this helps...Good Luck!