The low mileage you are experiencing with your 2008 Honda Civic, particularly getting only about 6 kmpl in city use, is not normal for this model. The 2008 Honda Civic with an automatic transmission typically achieves a combined fuel economy of around 29 mpg , which translates to approximately 9-12 kmpl. Several factors could be contributing to this low mileage, such as poor maintenance, incorrect tire pressure, driving habits, or potential issues with the vehicle's engine, transmission, or exhaust system. It is advisable to check the vehicle's condition, ensure regular maintenance is up to date, and consider consulting a mechanic to identify and address any underlying problems.