You may want to check by the oil filter housing. Look between the oil filter cap and the intake manifold and look on the block. you should see a cross hatch pattern on the block. If it's soaked in oil chances are you have an oil filter housing that is leaking or a VANOS line leak. You'll need a pretty strong flashlight to see in the darkness. It can be a pretty lucrative job for a do it yourselfer. If you live in baltimore I'd be glad to look at it for you free of charge. Just give me a call.
410-866-5440