This is a great car! I have 34000 miles and it drives very good and quite comfortable.
You must deduct about 2.2 mpg from the instant dash meter to get an accurate mpg est. that being said if I put my cruise control on 59-60 for a 55 mile stretch I get 41 mpg one way and 42 mpg back. That is after deducting the 2.2 mpg.
I use syntheitic oil, I went to 9.9 pound wheels with a 35 oz spacer on all 4 wheels. In a week or so I will put on new oem size rubber but they weigh 2 pounds less than the oem tires. I use a light weight crank pulley as well. If you find a place that sells ethanol free gas it may help slightly. One pound of turning weight equals 4 pounds of static weight.