Oh, one more thing to add. The oil fill levels should be measured from the top of the stanchion/where the top cap meets the stanchion/crown, not the bottom of the threads.
I've had a ride of my fork and it feels ridiculously plush and with the extra oil in the air spring lower leg, it should feel like this for longer now. I used some Fox 10wt Green because it's one of the best out there for lubrication but any 10wt+ oil should do. I've had to add some more clicks to the compression and rebound so some slightly heavier weight oil is definitely the way to go.
@fbk- Yeh, I took the service intervals with a pinch of salt and was planning on giving them some love before a year but getting that dirt under the seal meant I had to do it sooner.
EDIT- The service intervals say you should do an oil change 1-2 a year but I'd do it every 3-4 months to be safe and make sure your fork is working at its best.