RAM 2500 Oil.
Need Help or INF. I bought Used 2008 Ram 2500 turbo Diesel 6.7 Big Horn, Very low Mi. Runs And Looks great, But the first time I had to change the oil,12 Qts, w/new filter, On checking the level to ma...
Forum Discussion
JIMNLIN wrote:
The '03 has over 255k miles now and I still use the 7500/15000 mile oil change schedule from Cummins but losses that honey color at around 200 miles now.
I noticed when Cummins came out with the '04.5 325/600 engine with the 3rd injection event, some folks complained of their oil turning black quicker.
It still amazes me that Cummins put that long of a OCI on the 04.5-07 325hp motors with how much soot they put into the oil. Thou schedule A is a rare use and in that rpm profile (mostly empty highway driving) the 3rd event is very limited. Above 2200 rpms there isn't a 3rd event while cruising.. but that is also where the timing falls off and mileage suffers. The 3rd event starts to taper quickly at 2,000 rpms. But for it to be completely gone a NV5600 has to be cruising at 74 w/3.73s or 67 with 4.10's. A G56 has to be 68 for the AD or 73 for the AE. A 48RE has to be at 78 w/ 3.73 or 71 w/4.10... Pr
The 6.7 has up to 5 injection events but that pushed more fuel than soot into the oil. The 03-04's are generally TBN/contamination limited on oil life, 04.5-07 are soot limited, and the 07.5-12 6.7's are fuel limited. It will be interesting to see what the limiting factor is on DEF equipped 6.7's. I would guess TBN as CJ oil has a lower TBN than CI oil.
