Originally Posted by 328i M-Sport
Yes, the way they do it is by reading the knock sensor and reducing timing. For safety reasons, the "recovery time" for the timing to get back to normal is set to take a while. While it is happening, it will feel like a small misfire if there are enough carbon deposits.
So you would feel the difference in a newer car with carbon deposits after filling it with premium.
If youre feeling "misfire" is it not time for service? Bad part of that show was the interview with the Lawyer representing the fuel companies. He had no clue.