Re: gas in the crankcase
The oil will have a gas like odor. Thats remnants of the combustion process. Hence the need for using filters and changing oil. As stated above its an injector leaking if you truely are getting gas in the oil. If its not seating properly it will leak down slowly untill the pressure in the fuel system lowers enough that the injector does reach a point where it does seat enough to stop leaking. Or if that point is not reached the injector will leak untill all pressure is releived in the fuel sytem.
Making moves without being heard.............. I am the Silent Assassin.