http://www.volkswagen.co.uk/owners/servicing/regimes
straight off VW site
This Flexible regime has been made possible due to the development of new Volkswagen engines with the latest technically advanced longlife oil. These engines use built-in sensors that continually monitor the oil quality, making it possible to enjoy reliable and confident motoring for up to a maximum of 18,000* miles or 24 months (whichever occurs first).
I remember reading that too, and I asked about it. The service guy seemed pretty confident on his response that it is actually the ECU the one that does the monitoring and not the oil.
Maybe the guy was mistaken. Anyhow, he was very clear that the infotainment value is the one to go for if I wanted to maintain the warranty by using longlife.
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