I have an '06 Dakota AWD that I bought with 20K miles on it about 18 months ago. Since I bought it the thing has smoked on startup, not every time, and sometimes none. Sometimes it looks like the Marines are getting ready to come through. I have never seen it smoke when going down the road though. It uses about a quart in 800 miles.

Also, at times it tends to run rough at idle, but clears up. Has 59K on it now.

Any ideas?

Thanks!