blue smoke is caused by burning of oil, oil can get into the combustion chamber through the oil and piston rings and or the valve guides would be the most likely.
This is an educated quess, but I would think that gasoline got by the piston rings, and washed down the cylinder walls into the oil pan. a cause that comes to mind, would be that at some time the engine got flooded, maybe it was hard starting, and it flooded at some time. anyway the only way from the combustion chamber to the oil pan is to get by the piston rings.
Bad piston rings allowing oil into the combustion chamber.
Smoke and burning engine oil in the combustion chamber can be caused by a few things. The cause could be worn and leaking valve seals, worn piston rings, and less commonly, the head gasket.
You're burning oil. either your piston seals are not working or you have other seals that have gone bad resulting in oil entering the combustion chamber.
It is likely that the piston rings are bad, and the oil is getting into the combustion chamber. that is if it is burning oil.
Fouling Spark PlugsThere are only two things I can think of that cause spark plug fouling:The fuel mixture is way too "rich."The "oil" rings on the piston are worn, allowing crankcase oil to get past and above the piston into the combustion chamber.
low oil and a loose piston skirt
no, you have bad piston rings
Worn down piston rings will allow the oil to seep up into top chamber where the spark plugs are. Otherwise, you just have too much oil in your crankcase.
broken piston rings maybe and oil gettin into the piston chamber.. too much oil maybe a blown head gasket... the smoke is steamy
Worn piston rings allows the oil that is used to lubricate the cylinder walls to enter the combustion chamber.