Hello guys, I’m after some much needed advice if possible please. I have blue smoke coming from exhaust after about 20 mins of driving car. If I stop and turn ignition off then start the car again it goes for a short while. Can also smell a burning smell when the smoke starts. Have been told it could be turbo seal, piston rings or a pcv valve. The car has not lost any power whatsoever and still goes like it should. I’m curious as if it was turbo or rings wouldn’t my car lose power and smoke from the first time I started it? Any help would be much appreciated. Thanks in advance.