sorry if this has been rehashed before, but i usually dont drive alot so its usually not on my radar. anyhow, was traveling long distance today and noticed that my full tank range was 230 miles. as i drove more and more, i noticed that the range was losing mileage alot. so for example, i drove 50 miles, and the expected mileage left would be 180miles, but instead it would be 165. so i lost 15 miles...as i drove more and more, i would lose more and more. so eventually as i drove 150 miles, one would expect 80 miles left, but it would be 30 miles left. the weather was raining alot of the way, temperature was around 70 degrees. i was driving at freeway speeds of 60-70mph, and AC was run on low, nothing crazy. what else can i do to get the expected range as close to advertised as possible?