That's disgusting. Maybe the families of anyone who becomes a professional speedway rider should be executed?
Wasn't there any qualifying rounds in the past then for the World Team Cup?
You are wrong TWK. Castrol R & M is still widely used although it is more of a synthetic blend now. Plenty of other oils used are Castor based as well.
So 16 riders can be whittled down to 4 for the final. Unless you expect to see 16 riders in one race for your entrance fee. It really isn't difficult to understand.