CI-4 was the oil specification for diesel oil prior to 1/1/07 when the 6.7 hit the streets.

CJ-4 is the new oil specification for diesel trucks - minus a lot of the good stuff from the CI-4 oil because those good things (or other things that got removed at the same time) clog DPFs

DPF is, like he said, a diesel particulate filter. The DPF catches the soot particles, collects them, and when there is enough collected the ECM causes a major fuel injection event to raise EGTs that then burns off the accumulated soot.

So to make clean air, we consume more fuel. That makes sense, right?

 

^^ no it doesn't. I know all about these rush for green use more to use less bull crap. I'm not going into that argument, just know I'm agreeing with you 1000%
However, I'm now in the process of trying to buy a 2000 Cummins. Would that year still have a DPF type emissions system on it? I live in NY, and I don't believe there are any extra requirements for a year 2000 diesel truck other than what the factory put on it.

 

DPF on the cummins think it started in late 06 or the 07 model cummins

 

^^ Thats what I had thought.

 

Build date of 1/1/07 or newer will have the physical EGR system and DPF.

2000 MY will have the lift pump you're going to want to replace ASAP to avoid problems down the line, and I'm not sure what years were subject to the major flaws, but search for "53 block" and the "killer dowel pin". Both are fixable, but just know about them.

 

94-98 down pin and 98.5-02 53 block I believe but the down pin is on the 2nd gen 12vs

 

I will look for the 53 block, I've read that quickly on the forum. I don't know what the problem with it is, but, I read about them, basically avoid them.
The lift pump I knew about already. I will replace that when I have $600 for the aftermarket one (I can't remember the manufacturer). I think I'll be okay in the mean time as I have no plans on adding power, or increasing fuel. I'm not going to do anything like that until I know a lot more about diesels and whats good and whats bad.
The 2000 has a short warranty with it when I buy it.

 

53 blocks tend to crack more often for some reason.



Airdog or Fass are the two big players in aftermarket reliable lift pumps.