My car is mainly a grocery car. There are tons of breakers, holes, and broken roads throughout the 4-5 km drive to the store and my car gives 6.5 km/l when driven in this condition.
If I take it to a longer drive on main roads in the city, the max average mileage I've been able to get is 8 km/l. But that's still the average mileage where 90% of the driving is still being done for the deadstop-filled grocery route. I'm not sure how high the mileage would get if it was mainly driven on main city roads for at least half the fuel tank capacty. Or maybe it still won't make a difference at all.
What could be wrong? Recently got all fluids changed with genuine OEM Honda oils. Plugs serviced, computerized tuning done (idle RPM is optimal), catcon serviced.
Everyone says they're getting 10-11 km/l easily on this car.
What else should I get checked?
Thanks for any tips/guidance.