Howdy- well as part of a new forum- you might try reading the labels - like the 'don't post questions in this section'
That not just being grumpy - that's because folks don't normally check the Tech section - main discussion is 'CRD...Love that Torque'
also when you get time the Noob guide is helpful
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=54207Mine has never had vibration/ rough idle - stock it was smooth and you had to show people the labels to convince them it was a diesel.
when engine mounts die they rattle like a can full of rocks -and it changes in Neutral/Drive/Reverse but they don't vibrate - just noise.
Black oil is due to the ERG - and it will cause problems
best to repost in 'Love that Torque' maybe someone's got an idea.
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2005 CRD
stuffSkeptic quod gratis asseritur, gratis negatur