Here is another thing to think about as far as mileage goes, I know that you most likely already know that your driving style affects your mileage.. duh right?
Well, I decided to do a test and see just how much it will affect my own mileage about three weeks ago...
With the way I normally drive, I only get about 280 miles out of a tank of gas. I have a 13 mile trip to work, with one stop sign, the rest is 60 MPH crusin. probably 80% of my driving is highway...
I decided to fill my tank up and drive nice and easy, not use any boost and keep the RPMs below 3000 if I could help it. I did pass one car ( floored it ) and had to pull out in traffic quickly once or twice. I ended up getting just under 400
miles on that tank of gas!!!! All I did was change my driving style for about two weeks.
I burn roughly a full tank of gas in one week driving my "normal" way of driving, with that tank, I was good for almost two weeks
My "normal" driving includes flooring it from just about every stop sign, stop light, or turn. The engine revs up to 5000 RPM at least two or three times a day, but then when I get up to speed, I hit the cruise at 60 MPH and leave it there. My tires are also only at about 10% tread left on them with only 20,000 miles If that. They are a 60K or 80K mile tire
You can definately tell that there is a HUGE difference in mileage just depending on how you accelerate. I, of course, like everyone here already knew that, I just wanted to see for myself just how much of a difference it would make