the EPA just rated the 2016 Mazda 2 and by proxy the Scion iA. Granted the EPA ranked the 2 Hatch not sedan, so there will be some variability...
http://www.autoguide.com/auto-news/2015/04/2016-mazda2-returns-37-mpg-combined.html
http://www.autoguide.com/auto-news/2015/04/2016-mazda2-returns-37-mpg-combined.html