I got a '96 Audi with a 2.8 12v engine.
From the Pentosin site:
PENTOSPEED 0W-30 VS* is approved by:
BMW (Longlife)
DaimlerChrysler (MB 229.3)
VW 502/505 (1.97)
Audi 503.01 (1/2000)
PENTOSYNTH 5W-40 is approved by:
BMW
DaimlerChrysler (MB 229.1)
VW 502/505
Porsche
PENTOSYNTH 5W-50 surpasses PENTOSYNTH 5W-40, if it is used in high power engines, including multivalve petrol turbocharged engines. It may also be used in racing cars and is very well suitable for four stroke motorcycle engines.