that answer is very simple
where I live it is very rare for the out side air temp to drop below 30*F
but not uncommon to see temps above 95*
this is a 2.0 Turbo charged engine that uses the engine oil in the turbo
the turbo gets HOT thus breaking down the oil quickly
this is all fact
my .02 10K is simply to long to let it go under these conditions
do I know more than the mfg.? no
do I care what they say? no
it is my money ,and a lot of it, so for my comfort I am changing it every 5K
At the end of the day, 10k oil changes are all you need in a new VW.
Three of my close friends are mechanics at a VW dealership for the last 29 years!
Yes, it's your money, but why waste it?
And more importantly, why waste the motor oil when there is no point to it?
That's just a waste on a natural resource!