I am a proud owner of Opel Kadett 2.0 16V for some time-1 month. I just passed 300th km from purchasing, but started to play with some things. One of them is RON plug. It was adjusted for 98 octan fuel, and I was curious to see 95 octan setting. The car feels less punchy-torquy, and I didn't test over 4000 rpm much. My question is : How much exactly does 98 setting give power/torque. Does anyone have dyno graph on that?
Maybe it makes difference that my ECU is from Calibra 16v (replaced).