Cars Q&A

I am totally confused after looking different sites opinions of car exports as according to you and them the mileage of i10 sportz in somewhere between 12 to 14 while company says 17 to 20.36. In fact someones suffering arount of only 9 to 11. I am purchasing car 1st time having balance 4.7 lacs. My choices are A-star, Spark, swift petrol and i10 sportz. I am looking for best mileage car among them. As I have marked that in look, interiors, exteriors, luxurious, comfortability and features i10 is best. But mileage still "mystery" for me