Well since my wifes SC was having some idling problems I started a pretty big tune up. I have replace the plugs, wires, coil pack, belts, thermostat, and the IAC. I have also flushed and refilled all the fluids except for the supercharger. I am planning on starting that project today or tomorrow. After contacting Ford I found that the fluid is almost 60 bucks for enough to refill the supercharger. I have been hearing that the GM Supercharger Fluid is the same stuff from some of my friends. Is there any truth to that? I only ask because the GM Fluid is only 15 bucks for enough to fill up. I was told by a GM parts guy that it should be compatible as well since both GM and Ford used Eaton Superchargers.