Bit off-topic, but...
While recently making a video, I was logging data via OBD from the car, which included the water temp and, to my surprise, I noticed that although the car indicated and reached the mentioned 90 quite fast, the real raw values were fairly different.
If there is any interest from you guys on it, I might run a more complete experiment with a camera setup aimed at the dash and a video capture of the phone logging raw values so that we find out what is going on.
To my understanding from a previous discussion on the Skoda forums, indicated "90" coolant temp can mean anything on the 80-100 range.
No idea if the oil does anything similar, but I am guessing it is more accurate.