When I drive to work it's quite early with minimal traffic. With previous NGK stock spark plugs I would get around 5.7 however with the bosche about 6. One of the 3 times I have drive to work (which is more accurate to judge than driving home in traffic) it was raining but other than that similar weather.
Car definitely seems on par, maybe a little better in terms of performance with new plugs. I also thought there might be some sort of run in procedure I missed although I would have thought it would be sorted 300km in 🤷.
I am a little bit of an amateur but took my time and bought all the correct equipment to change them.
Skoda wanted $70aud for a single spark plug 🤡 the bosche I got were $99 for all 4 and definitely the correct plugs.