i have belta 1.3 white, its 4 WD and it give 14 - 15 in city with ac...and 17 - 18 in long...
if you go with 2 WD, that will give you great results... JDM cars are known for fuel efficiency and lifting engine load in our seasons....go for it...
another experience i recently have is that i bought 2000 city for rough use, its JDM i think, its milleage is same as vitz...and drive is greatt.....i previousy bought 2016 1.5 auto city and sold it immediatly coz of poor suspension, drive and fule avg.....