in the oil sump, and is chain driven
About 4 letres
about 4qts
49
Dipstick should be marked
5W30
Turn counterclockwise.
3.5 liter
5w30 full synthetic. i prefer Mobil 1
if your oil pressure is normal, you may need to replace one of the oil pressure sensors with a bigger window-(ask your vw parts dealer), i have a 1991 gti gulf 1.8 liter and i had to replace the high oil pressure sensor because of false readings
Use 5W30. 5W40 diesel-rated oil would be right for a TDI.
cal vw or your local parts store and they will tell you.