Honda Civic 2006 Car Mileage

I have Honda Civic 2006. Its been a great car so far. It is stylish and very fuel economic. One time I had problem was the battery suddenly drained and failed to start a car. I visited Honda dealer and they fixed it without any out-of-pocket cost because battery comes with 5 years of warranty of replacement within car warranty. I am living in Houston and going to office in rush hours. In city, it is giving me mileage around 28-32 miles per gallon. Yesterday I went to Corpus Christi. For the whole time, I was on cruise control of 65 mph speed limit as I was driving in night time. It gave me a mileage of 44 miles per gallon. That’s awesome, isn’t it?