Hard to see if the fuel economy changes. Because I also use the car offroad and then it really likes the diesel

About the ALDA. I didn't try harder because I don't know if it brakes fast. Maybe it is possible to turn it further. It could also be changed with getting of the plastic cover because that was hold tightly. And when I got it off the screw allready came off. Is there any correct way to check the correct setting? Or are we just trying and geussing here?

Greetz