Hi all new member 2013 jazz si . what is the average miles per gallon I should be getting from the car . driving will be mostly urban .thanks

 

There are far too many variables to give a very useful number. I'd suggest looking at someplace like Fuelly and seeing the range that people are generally getting. (Do make sure you select the correct gallon, since the UK gallon is bigger than the US gallon.)

 

When you say urban I suspect more driving in 3rd and 4th gears, which means you will likely get 28 mpg. If you drive much in 5th 30 mpg.
Highway as much as 40 mpg. only your driving style will set mpg.

 

And then multiply by about 1.2 to account for UK gallons...