I have bought Tiago diesel XZ vairant on 23rd DEC 2016 and run till now 950 kms.
I preferred this car for mainly mileage and low cost as I have to travel daily 100 kms to my office
And as expected it delivered good mileage of 27Km/L in city and 30Km/L in highways(speed 80 to 100 and 50% with AC).
I am surprised by the mileage as the claimed mileage by company is 27.2.
I will update after a month usage.
Update on 02-JAN-17
Traveled 600km+ 600km up and down on highway with 26Km/L mileage at speed up to max 80/hr
Update on 22-JAN-17
Traveled 600km+ 600km up and down on highway with 22Km/L mileage at speed of 120/hr
5600KM in 30 days, overall very happy to be a Tiago owner
Regards
Selvan
Chennai