Page 4
On May 5, 2004 (Cinco deMayo!) we had the oil changed (Mobil 1) and decided to change the differential fluid even though the car has only 3357 miles.
Greg at Stillwater Motors (local GM dealer) does all the maintainence on my cars:

SLP recommends only 80W90 mineral-based oil with 2oz slip additive for the Auburn high-perf posi

As long as the car was in the air, we took some pictures....NEXT PAGE