Issue with CX-9 Fuel Consumption reading?

[Asif]

Any idea why my Mazda CX-9 2018 GT model with odometer 65k showing 16.4/100L fuel consumption whereas it should be between 8.5/100L or 10/100L according to the most Mazda CX-9 2018 advertising says?

 

[N7turbo]

I recommend calculating it manually to see if it's real or an error.

 

[youri]

Might be worth looking into replacing the spark plugs, that is about when they are due.

Other possible cause could be a stuck brake caliper, although if it was that bad you would probably smell the burnt brake pads.

If you are only doing city driving and a lot of idling it could show that high, but my average for mixed driving isn’t that high.

Always driving in sport mode or towing could also bring the fuel consumption up.