Quote Originally Posted by sparkles View Post
I just changed mine.It is simple but I called 3 dealerships in my area and none had the oil.Balwin buick in Laurens SC did tell me to use a 5w30 synthetic.I went with royal purple.They could order the oil for me but I had to order a case and he said I didn't want to know how much.My supercharger is much quieter now.
FWIW, this has been widely debated in other forums. A couple have used synthetic fluid, but it is really not recommended, and has never been extensively tested. The GM supercharger fluid is apparently used because of it's ability to not foam and cavitate when running at 15k+ RPMS. Synthetic engine oil does not have these same properties and the cavitation can cause excessive wear problems on your gears. I understand you wanted to change the fluid, but I would try to get the correct fluid in there ASAP before too much damage is done.