maybe it's the fact that the gearing is bs. 1st gear is sooo long, 2nd gear is USELESS, and 3rd gear is just way too low. ok. i used to have a golf with an automatic... that thing would turn my air filter oil filled in no time. (brought it up to about 7k rpm though :lol:)i think it is because you need to stomp on it to get it to go. could also be that your bores are a little bit oval, giving the rings a bit of a bad seal.
What was your ring gap, or did you use the Total Seal rings? I don't think you could have had hotter oil than I did on my trip. I am running 15W40 btw. I'd try a hose from the block off plate to the breather as it can't hurt.