85 350x gas and oil problem

[hsstsss]

what would cause gas in the oil.
i openend up my oil cap today and gas and oil (mainly gas) came out of it and i am stumped on what is the problem the only thing i can think of is the case is crackred somewhere and it runs fine and dosent smoke at all

[daniel_250r]

only thing i can think of is you are leaving your gas on and the gas is seaping past the rings? or the overflow tube is plugged and the gas is draining into the combustion chamber?

[hsstsss]

Could that ruin aything inside the case at all? We ran it for probly 5 min and then discovered that ut other than that it has just been sitting with the gas on for about a week and a half.
would we have to take the cases apart and have it dry out or just drain the oil then put new stuff in and the drain it again and do that like e or 3 times would that work?