Castrol sells a Formula R 5w30 synthetic down under in Australia with some pretty impressive viscosity specs and OEM approvals:
Vis @ 100°C = 12.2
Vis @ 40°C = 72.5
(Mobil 1 5w30 is 53.7)
VI = 168
Pour Point = -40°C (not too impressive.)
SL/CF A3/B3/B4
MB 229.1, 229.3
BMW LongLife 01
Porsche approved
VW 502, 505
[ May 28, 2003, 11:44 PM: Message edited by: G-Man II ]
Vis @ 100°C = 12.2
Vis @ 40°C = 72.5

VI = 168
Pour Point = -40°C (not too impressive.)
SL/CF A3/B3/B4
MB 229.1, 229.3
BMW LongLife 01
Porsche approved
VW 502, 505
[ May 28, 2003, 11:44 PM: Message edited by: G-Man II ]