This is in regards to your query posted on the website CarDekho.com, we would like to inform you that Nissan Micra is available in both petrol and diesel variants. So you can opt any of the variants as per your running.
We encounter similar question many times, the easiest way to increase the mileage is to keep your car healthy. Keep the tyre pressure proper, air filter clean, always follow speed limits and turn off your engine on traffic lights. Find more tricks here- Please find the details Chevrolet service centers here- http://forum.cardekho.com/topic/356-how-to-increase-mileage-of-your-car-tips/