Faults:

I'm paying a lot of money for fuel.

One liter = 7.5 kilometers; is that normal? My friends they said about their cars: one liter = 13.0 kilometers.

They told me to change the oxygen sensor, but it doesn't work.

I would like to know what should I test to make it better?

General Comments:

It's great car. I like it too much. I think in the future I will buy another one from the same company.

I like Renault cars; it's very comfortable.