My drive only 5-6km per L. I saw online usually for my car should be 10-12km per L. I am like only half.. 300km plus with 53L petrol for 2L car.
That time workshop checked have misfire. Replaced spark plugs, ignition coils, fuel injectors. Last service need a gear box oil replacement.
I also washed my cat converter, very dirty I suspect engine running too lean.
Got slight jerking when idle sometime at traffic light. Vibration when stationary and D, but normal at N. Replaced engine mounting still the same.