Doh! You're right, it does have a large oil pan (aluminum). Some people are forever replacing them because they are exposed and relatively sensitive - skidplates or cast steel units are also used.
In my 325e the drain plug was stripped and the mechanic had told me it would be very expensive to replace the oil pan because it's not just a pan, it's nearly the bottom half of the engine. The PO had just glued it shut with silicone glue - I discovered this within a week or two of buying the car and was catching up on routine services. It was odd that this guy really did not want to replace the pan- he said it was like taking the bottomw half of the engine off and would be much more work than it was worth to fix...
I was going to fix it at another shop, but before I could get it done, I hit a bump in the road that actually sheared it off (similar to this car, pictured below).
At any rate, I've been terrified of the aluminum oil pan ever since![]()






Check E28's too, a 528e has just as much swagger as an e30 and aren't crazily overvalued.
