I've been consuming ~1 qt. every 2-3k miles. I think you may have seen my post on the FB group about my intake pipes starting to drip oil! OCC is a must, and I've got the AR design one on order... It'll definitely keep the oil from going where it shouldn't but it won't do anything for your oil consumption. I'm doing an oil change every 7.5k miles FWIW, and will be doing a change sometime this week (just hit 37,500 miles).
Also, you mentioned that you bought a qt. of Castrol 5W-30... did you make sure it was LL-01 spec? I'm going to ask the dealership to hand me a bottle or two of their oil, so I don't have to pay for something that should be covered under the maintenance plan.
2008 E82 N54 || Stage 2 -------- Gone to a good home.