got similiar story.
my sisiter lives half the year in the states, the other half in asia. when i was living in her house, i would regularly drive her cars around, but since i moved out, i guess no one was taking care of their cars. she has a 2000 740 il. i guess she didn't do anything to the car for an entire 6 month period while she was gone. i went to visit her, took a look at the car and almost fainted. the hood squeeked open, cobwebs everywhere, dead snails everywhere, what looked like an abandoned birds nest. i pulled out the dip stick and there was this resin looking thing, reminded me of my college years cleaning my bong.
i was like wtf. sister said oh well. "lease is over in a couple months anyways". guess thats true.