I've seen ethanol gas make "steam" clouds when an injector sticks or an engine floods before,bad enough to think it had blown a head gasket...sometimes smell is a better way to tell whats burning...
Antifreeze smells like burning sugar or cotton candy--gas will smell raunchy,like lighter fluid almost,and it stings your nostrils...
Oil smells like--well,burnt oil!..
if a fuel pump ruptures its diaphpram on a mechanical pump,it can fill the crankcase with gas and dilute the oil enough to make it smoke,and possibly ruin the bearings from lack of lubricity,and it'll wash any sludge into the oil and possibly clog things...smell the oil filler opening,or the oil on the dipstick,and also see if the oil on the stick lights easily with a lighter,if it does and smells gassy,thats probably the problem--but what caused it must be corrected or it'll just keep happening..
Also,coolant can often be seen on the sparkplug of a cylinder with a leaky head gasket or cracked head,block too--a friend of mine pinpoints a lot of bad gaskets by listening to how it cranks first thing in the morning after sitting overnight--if it spins over once,them hesitates a few seconds before making another revolution,then turns over normally,its likely one cylinder has enough coolant build up in it, to almost hydrolock it...by pulling the plugs out and looking for coolant on the electrodes,the guilty party is usually evident...
