Thanks for the ideas guys. Its definatly not diff oil, but youre right - that stuff stinks. It's not dead either. I got an unsuspecting victim to come for a ride in the car with me - her first reaction was - 'wow this car smells like manure or rotten flowers'.

I've been smelling around like a crazy guy. (Anyone watching on would think I've lost my mind - I even look like that pollie that was a chair sniffer). I think the smell is coming from the upholstered inner wheel well linings that go from the carpet to the buff covered trim. They are not carpeted, but are covered in a furr like fabric. I wonder if I pull them out and give them a good scrub with laundry soap??
Any tricks or special tools needed to remove the interior trim that you guys know about?