I dropped my IPhone 4 in Car Oil

Ok so I dropped my phone in car oil for like maybe 3-4 seconds and I got it out and cleaned it up and now it looks normal now except it has oil behind the screen and I don't know what to do cause i'm scared its gonna break, Do I have to take it apart or do I have to sit it up to where it comes out of the hole where the charger goes, please someone help me! Please answer As soon as possible thanks

You'll have to open it somehow. That oil will corrode the board and fry circuits and short the phone. Oil has to come out very very soon or your phone is done for. Best luck.