Originally Posted By: Clean_Engine
Sorry for the lack of information.
The vehicle's a '08 X5 3.0si. The odometer reads 5600 miles. Yes I drive extremely little, and when I do, it's a very short trip, so the engine has almost no chance to warm up in many cases. So I understand this is not the ideal condition for the engine to work in. The first and last oil change was at 3200 miles in March 2010. I'm not sure what kind of engine oil BMW dealers use but I think it must be a synthetic.
I drained the old oil about an hour after the driving the vehicle and having it fully warmed up. So the oil was warm, but not hot. I did it in the basement so the the ambient temperature was around 50 degrees Fahrenheit or 10 degrees Celsius.
Hope I didn't forget anything else.
Do you have a receipt with the oil change on it? Was that the sole reason for going to the dealer?
How short of trips does this thing normally see; 5-6 miles/day, every single day, with no highway miles? If the oil never gets up to temp or even close, I can see excess fuel dilution causing excessive oil degradation. However, I don't think there's an oil out there that would be used up after 2400 miles of use, even under the most severe circumstances.
If you weren't only at the dealer for an oil change, then maybe it was never performed, though probably either due to miscommunication or an error on their part. I agree with a previous poster that the chances of the BMW charging you for an oil change and not doing it are nil. It's either that or the oil isn't as bad as you make it seem. Unless it's really bad or you have a problem, most oil will shear down and come out as dark and runny rather than dark and thick when we're talking about the miles you are. The chances of it oxidatively thickening to the point where it comes out noticeably thicker, IMO, are slim to one with only 2400 miles on it.