What is the mileage of Maruti Ritz?

Maruti Ritz is known for its good mileage, the petrol variants of the Ritz gives a mileage of 17.7kmpl (ARAI Certifiel), whereas diesel variants gives a mileage of 21.1kmpl (ARAI Certified). However, the newly launched facelifted Maruti Ritz ZDI returns a mileage of 23.2kmpl.