Speaking to the dealer forgetting to put in oil, they did the same with me. I took my M3 in for the recall (yes, I was one of those unfortunate individuals who bought an M3 with a production date between late 01 and early 02). After they changed out the rod bearings and oil pump, I left the dealership expecting my car was to the "full" mark. I left for a trip and after driving 250 miles, my amber warning light went on when I stopped for breakfast. I checked the oil only to find out it was below the fill mark. Well, not much synthetic 10W 60 in Tonapah NV. I was fortunate to find a Napa auto parts store that had 15W 50 synthetic mobile 1. They had never heard of 10W 60. I called the Desert BMW service manager in Las Vegas and explained my concerns, including mixing the viscosity of the oil on a new bearing change-out. He said it would cause no problem. He offered up a free mid-service oil change, which I took advantage of. The upshot of this is that he said it is a common mistake when doing this kind of major engine work, because the mechanics are not considering residual oil in the system, which is typically a quart . He also stated that due to the frequency of this boo boo, BMW has put out a service bulletin to address it. One would think the technicians would be on top of this sort of thing.