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Asking this question because people on the Jeepforum.com arent 100% sure off hand. My 5.9 consumes about 1 quart every 3k miles, has for the last 5 years ive owned it.. It had 118k now has 180k. I did the plenum fix 3 years ago and it didnt help and my plenum is dry and clean so my Jeep just burns a quart every 3k.. I put in half a quart at 1500 miles so i can keep it topped off.
I was told this was normal/acceptable consumption, at least from what i remember.. but does anyone know what the FSM states ?
Totally fine. Mine has burned 1-2 quarts its whole life. When it drinks more, I know its time to change the PCV valve (Mopar). All engines burn oil, others more than some. My dad is happy when his Cat only uses 2 gallons per change in his W900.
Tell me about it.... Mine is most certainly what I would consider "excessive".... I go thru a quart about every 100-150 miles.... Only smokes at startup.
Tell me about it.... Mine is most certainly what I would consider "excessive".... I go thru a quart about every 100-150 miles.... Only smokes at startup.
Before I developed a minor leak that I haven't yet isolated, my 5.9l consumed between 1/2 and 2/3 quart between oil changes. It tasted like doing mostly or all short trips increased consumption, while doing mostly road trips decreased it, but that could have been an artificial flavor.
i went from 2-3 quarts every 3k miles prior to plenum kit to about what you are experiencing now -after the fix. I am at 151k miles now. I would say you are doing good.
I have almost 200K miles on mine, so, I am quite sure the valve seals are shot. I have my doubts about the valve guides as well, not to mention piston rings..... I haven't really done much diagnosis on it, mainly because even if I find what's wrong, I can't afford to fix it. I have another motor hanging on the engine stand in the garage, the plan, hopefully, is to 'freshen' it up this spring, and install it......