Hyundai Grand i10 gives best mileage Hyundai Motors India is one of the leading passenger car designers in the nation's successful car market. Hyunda Grand i10 is available in both petrol and diesel engine variants that produced a good mileage. Hyundai Grand i10 comes with 43 litres fuel tank capacity and it's mileage is 15.9 kmpl in city raod and 18.9 kmpl on highways on petrol engine variant. And it's diesel variant mileage is 21 kmpl in city raod and 24 on highways. So, we can sey that Hyundai Grand i10 gives a great mileage in both petrol and diesel engine variants.