Technical Fuel consumption

[Unsolved]

Nowadays my fuel consumption is about 8.5-10L/100km with average speed of 15km/h (due to high traffic)
Is that normal?
If not what could be the problem?

 

[Zardo]

Fuel consumption rises if low gears are used, for example first, second gear and third gear all the time, like in high traffic and mainly congested city roads, I'd consider that to be normal if your average speed really is as low as 15 km/h (I never had such a low average speed). With an average speed of, for example, 70 km/h on country roads with few stops and mostly in fifth or sixt gear, the fuel consumption as specified by the car manefacturer should be reached (6 liters or slighly below for the Punto, depends on model and driving style).

Try a country trip and check the fuel consumption again. It's also possible to reset the ECU using a OBD-Tool so it'll start from scratch and will "relearn" the best injection timing for the petrol used.

Does it show any faults, a high fuel consumption could be caused be many technical issues... Do the spark plugs electrodes look fouled or black?

 

[The Panda Nut]

15 is a very low aversge and that says traffic, which you already said. Driving in traffic is bad for economy so Zardo's suggestion is a very good one.

 

[AnthonyH]

A bicycle would be quicker! Although maybe not safer.

 

[Unsolved]

Fuel consumption rises if low gears are used, for example first, second gear and third gear all the time, like in high traffic and mainly congested city roads, I'd consider that to be normal if your average speed really is as low as 15 km/h (I never had such a low average speed). With an average speed of, for example, 70 km/h on country roads with few stops and mostly in fifth or sixt gear, the fuel consumption as specified by the car manefacturer should be reached (6 liters or slighly below for the Punto, depends on model and driving style).

Try a country trip and check the fuel consumption again. It's also possible to reset the ECU using a OBD-Tool so it'll start from scratch and will "relearn" the best injection timing for the petrol used.

Does it show any faults, a high fuel consumption could be caused be many technical issues... Do the spark plugs electrodes look fouled or black?

I just bought this car as my first car. I had it checked by a mechanic, and the engine seems fine. I also recently changed the spark plugs and filters.....

The average speed is quite low because the city is so crowded at the times I use the car to get to university.

I’m worried because I think the fuel consumption might be high, and that could be a problem.

P.S. Thank you for answering!

 

[Unsolved]

A bicycle would be quicker! Although maybe not safer.

The traffic is crazy at the times I use the car, especially in the morning and at the end of the day when the streets are crowded