Varies from year to year.
10w40 or 10w30 class J motor oil
Use 20W50 oil (Castrol makes it) in a type 1 VW.
Penzoil makes Quacker State Motor oil
SAE 10w30
mobil makes the oil
For an aircooled VW Beetle, use Castrol GTX2. It has the right viscosity.
Advance motor oil is made by Coastal
I use Mobile 1
PEAK makes peak motor oil, they are known for their antifreeze products before they launched their motor oil line. It's apparently already sponsored the IndyCar when it was first launched in 2007, and is being called "premium motor oil".
Omni specialty packaging makes the orilly brand oil
Omni specialty packaging makes the orilly brand oil
Advance motor oil is made by Coastal