Nissan Dayz 2014 ( petrol Average Issue )

[aaliyan.shoaib9]

I am facing an issue in nissan dayz 2014
It is giving me petrol average of 11
However i have chnged , airfilter , Throtal work done , Catalatic work done , Fuel injector work done , plugs changed.
But same issue.
Give me any solution if someone knows

[hamzazafar0312]

hi how did you improve it??
facing same problem