Originally Posted by 328i M-Sport
How are they going to determine a used oil type, assuming it has a reasonable weight? I seriously doubt a dealership would try to send oil to the lab. Not to mention that any decent oil of a reasonable weight can only cause very long term problems.
The things you read on luxury car forums sometimes. I would worry much more about cars with improperly offset wheels, stretched tires, bad alignments due to lowering, screwing up a sophisticated electric system due to poor stereo installations, etc.
I've seen that sneaky detective stuff on TV. They'll offer you a cigarette, and then cut it short, and get some DNA off the filter. I'm sure they can do the same thing with your car....those sneaky ba*******!!!