I would assume so. I just bought a supercharger with only 200 km on it that hasn't been driven since '92. I haven't really had the car out yet, but it did not leak for the short time I did drive it.
Try checking the fluid level on a level surface. If you need to top up, go to your local GM dealer and grap a bottle of the synthetic stuff they use for the GTPs, Regals and Bonnevilles. It may not be any better, but it sure is cheaper!