why is there oil coming from my air intake system in my car?

[PETE C]

i have a 93 mitsubishi eclipse gs non turbo and i recently was driving it on the free way and it was driving fine till got off and when i got to a stop light my car started to stutter and i was losing power and i heard a noise come from my engine and my car slowly shutoff and wouldnt turn back on i had to push it in to a near by gas station and park it so when i poped open the hood i noticed that my air intake poped off and there was oil all in side the intake hose and the intake filter so i desided to replace the intake system with the cold air intake that came with the car when i bought it the car still would not start till i let it sit for a few hours i drove it home and i only drive it to a store by my house cause im afraid it might happen again any ways i just wanted to know why my car would shoot oil out the intake and how do i fix this problem. also now my car is wasting more gas than it used too. is it a blown head gasket???? also i bought the car used for 800 and i love it and hope i dont have to sell it. also the engine light turned on and wont turn off. and the car still stutters when i drive it. I got big problems please help. thanks..