Yes, its very magical. That is the only way to go 10k miles with minimal pollution and maximum mpg, and whatever VW considers acceptable wear patterns.
So, if you change your oil at 7.5k, 5k, or 3k, do you need the 508 oils? do you even need synthetic?
I
f you use a non-OE spec oil, you should gather multiple UOA's to see what is going on. Otherwise, you're shooting in the dark or playing Russian Roulette.
BTW, when I looked in erwin for my VW engines since owners manual scares you into 508 oil only:
1.4L (DGXA / DJXA)
VW 508 00 (0W-20)
VW 504 001 (0W-30)
VW 502 001 (5W-40)
2.0L — (DKFA)
VW 508 00 (0W-20)
VW 504 001 (0W-30)
VW 502 001 (5W-40)
And, even though my owners manual recommends 87(or higher), erwin mentions "
but with reduced performance" concerning
'lower octane' fuel. So, mine has always enjoyed premium at every fill up. Notice how the owners manual is catered to the US sheeple market never mentioning premium fuel for the 1.4T or the 'reduced performance'. Can't have that with the cheapskate market!
My weather patterns are fine with 504 and 502 oils. So, I gave in and filled her up with Pennzoil 0w40 Euro and 5w30 EuroL leftover oils I had on the shelf. I am maximizing pollution and minimizing MPG

and enjoying my not-so-reduced performance of USA 92-93 octane fuel!