b7 rs4 idle

hey quick question. when the car is hot (210) oil temps in stop and go traffic, when idling for about 1-2 mins the car idle stumbles a little about 100-200 rpm and goes back to normal. when this happens blue smoke comes out of the tailpipe when it stumbles and goes away when back at normal idle(800 rpm).

and sometimes when taking off in first gear slowly to 3k it’ll stumble and spit out some blue smoke as well. kinda feels like a slight misfire but not a full misfire.

thats the best way i can explain it.