Hey guys i bought my civic at the beginning of this year, it was bone stuck apart from an aftermarket pod filter. With my lead foot, i was getting about 330-380km per full tank. The last time i filled up (was a few days ago) i filled up with premium petrol and i resetted my ecu by taking out the fuse for a couple of minutes, I heard that this resets the airflow or whatever that is responsible for fuel/air mixture and hence the engine is able to comprehend the extra air coming in thus increasing fuel efficiency.

I don't know if it's placebo or not but i felt that the car was more reponsive and had a tad more power. I also realized that i've travelled 255km and i've still got about half a tank left.

Could it possibly be that the power of premium petrol and resetting the ecu doing wonders or am i going insane here ?