As an Amsoil guy... I've been doing mine every 12.5K or 6 months whichever comes first. Using OUR Oil Filter (created for Long drain intervals) and the 0w30 Synthetic Oil we have.
Now we have our new Ea Oil Filters that last 25K... although having a modded Audi w/ 1.8t, I just play it even more safe and do the 12.5K or 6 mo.
You must keep in mind that cars of long ago (before O2 sensors and other related emissons came about) used to run about 180 degrees F.... Now it's not uncommon to see 210-230 F in our newer cars. The cars are buring cleaner and polluting way less and your insides are staying much cleaner too! And if you are running Regular oil... it's breaking it down that much faster.
It's a must to run Synthetic no matter who's brand you choose! Regular oil was intended for the old 180 degree engine temp cars (and there's wax in it, that creates sludge and varnish -- build up), it was okay for the times, yet didn't really offer the protection of the PURE Synthetic that's on the market today.
Unfortunately Amsoil has not developed the Oil Filter yet for this new car. I sell tons of the one for the 1.8t's.
Our oil works great with the OEM filter "for the manufactures recommended drain interval."
Once we come out with the new filter I will inform everyone here.
And stay away from the Quick Lube joints. Even though they change the regular oil every 2-3K... there's still little protection in there for todays hot running engine.
Happy Motoring!