'90 Coupe Q. Blue Smoke, Help!

[dalcott@juno.com (David w Alcott)]

Hi Listers,
	
I have blue smoke coming out of the tailpipe. I never really noticed it
before today when I waited on line to get my car inspected. I was idleing
for about 10 minutes before I actually got it inspected. When I got to
the booth where they slap the sticker on, the guy pointed out the blue
smoke eminating from my tailpipe, and then he paced I nice red failed
sticker on my windshield. When I got home, after driving at highway
speeds, the smoke was gone.

Question: What could be causing it?
	Valves?
	Piston rings?   :-(
Is anything common for these cars?

It has 80k miles on it. 
It looses about a quart of oil everything two thousand miles.

Help.
Dave