Can someone please give me a good reason why the oil change intervals for our vehicles are at 10k miles? The oil is obviously not good enough to make it that long as proven by vortex members with UOAs and very apparent visual signs. I used to work for a VW dealership and we'd get 1.8t's all day long with clogged oil pickup tubes from gunk. These customers were faithful to their service schedules and always had their booklets stamped at out dealership.
I think it's naive to assume that VW hasn't done their research on this topic while building the engines. Their teams of engineers they have MUST know about this issue, as it's been happening for over 10 years on their turbo engines. with 1.8t it was sludge in the crankcase, with ours it's on the back of the valves. With either engine, the oil is well past its useful service life at 10k miles, or even 5k with most oils.
Knowing these facts, why would they
1-insisting on 10k oil change intervals
2- not certifying some of the best synthetic oils in the world
3- Not letting you buy a warranty past 75k miles??
Someone out there give me a good reason that this is the way it is. I don't see it.