[FrayAdjacent]

I average about 22mpg mostly city, and can get up to 31mpg on highway.

Here's my tips on attaining higher fuel economy. I learned a lot of this when I owned a Honda Insight. That car will tell you what works and what doesn't as far as getting better gas mileage, and it all translates to other cars.

• Use the correct grade gasoline. Your engine will run best on what the manufacturer recommends. Do not use higher or lower grade gasoline.
  
• Make sure your tires are properly inflated. You can usually safely run them at a slightly higher pressure, which will reduce 'rolling resistance'. I would not recommend more than a couple PSI over the vehicle's suggested pressure
  
• Have your alignment checked and adjusted. If you do not track your car, you could have the camber and toe adjusted to be more neutral.
  
• Replace your air filter and change your oil at regular intervals
  
• Avoid jackrabbit starts, and use the highest gear you can to cruise in. Avoid changing speed a lot on highways and freeways. Use your cruise control if you can.