The blue smoke is blow by on start up. The piston rings are still cold and when they start to get older, they take a few moments to warm up and expand to create a good seal and stop the escaping oil. It is pretty common when cars get up in the years and is not a huge issue.
There are three types of smoke that will exhust from your gasoline engine: White smoke, actually is steam from condensation of water within the muffler and exhust system. Number two is Black smoke, this is from unburned fuel. The engine is running far richer that it needs to be. Number three is blue smoke. This is usually associated with oil comsumption.
Stuck or broken oil rings can cause blue smoke.
Blue smoke is burning oil.Blue smoke is burning oil.
blue smoke can be caused by sticking valves or burnt rings
Burning oil
It is caused by oil getting into the combustion chamber and burning off
Cold start
Blue smoke is caused by engine oil being burnt by the engine.
Blue smoke can be caused by a blown head gasket. . Blue is oil being burned in the engine.
In a diesel engine, blue smoke is an indication of oil being burned. Black smoke means that there is incomplete combustion of the fuel. White smoke can be seen when raw diesel fuel is not being burned.
My understanding of exhaust smoke is that Blue is oil, Black is unburnt fuel, White is unburnt diesel on cold start. The main question would be, how much smoke and when does it do it?
Yes, can leak oil causing blue smoke