30w is the manufacturers recommended.
- - - - -
The best oil I know of for these engines is Shell Rotella T--SAE 30 in the summer, SAE 15W40 for all-season use. Rotella is heavy-duty diesel oil and it only comes in those two weights.
A 2001 Volkswagen Beetle needs 10W 40 motor oil. The Volkswagen Beetle is also known as the Volkswagen Bug and originated in Germany.
As far as I remember from my old V Dub days is there wasn't an oil filter but a screen located at the drainplug. Therefore you would lose your oil by removing it. If it has an after market filter you should be able to change it with little spillage.
Gear oil 90 weight
Amsoil
oil temp- 1970 1600 sp euro bug
10/30
10 w 40 oil
30w
Shell Rotella T 10W30.
10w 40
SAE 20w50 synthetic.
metal pan is the oil pan on 2003 Volkswagen Passat.