I have an odd collection of oil hanging around from various E-Bay shopping and this site.
Penzoil 20W-50 Dino, 5 qts - For the MG
Amsoil Series 2K 20W-50, 4 qts - For the MG - ebay deal
Amsoil 10W-30 and 5W-30 2.5 and 1 Qt respectively - More ebay deals
Amsoil Series 2K 0W-30, 1 case- For my GP, 12k interval experiment
Mobil 1 15W-50, 1 Qt - Boss gave to me since he was cleaning out his garage
Auto-Rx, 2 bottles (yes, I know it's not oil, but I gotta give props to Frank)
Not that big of a supply, but it does get looks by people when they walk into my garage.