Engine oil smells gasoline

What causes the engine oil to smell gasoline? Would appreciate some help from you FABO member the engine is a 318 with electronic ignition. The car haven't run for over 2 years so for now i'm trying to get it running. It runned good before i took the carb apart because it was dirt in it so the carb to manifold gasket went bad so the idle isn't good because of that. Every time the engine is cold i have to pour gasoline through the carb to get it running. I hope you can give me some answer. Thanks