Nice one and great to see your loving the car. Welcome to the 2017 era, we are breaking new ground Just a few comments to make on your post.
Are you really ment to keep the revs below 4000. Ouch. I can't remember how many time I have hit the limiter.
I have a lot of wax showing on my engine, however I'm not to bothered about it as it's doing a job of protecting the components.
I also love the sound and the worrble that comes from the car, however I'm planning in installing a cat back exhaust shortly. The noise insulation inside is good however I often switch the radio off and role the window down. lol
I agree with you regarding the starlink system, and it's even worse when you down load the app, now that is crap. lol
Yes I have been using a bit of fuel as well, most of which is BP's unleaded 97.
One thing I did take advantage of was the Autoglym life shine protection system on offer from Subaru. http://lifeshine.com
Enjoy the ride. :-)