I'm not sure I get it, I'm about as stock as can be except recently for performance muffler and green air filter. I'm not lifted, don't have oversized tires, anything. Fluids have been changed, I feel I drive smart and most of the mileage is highway. I've gotten to 300 maybe twice since I've owned it and I consider 270 good and average for me. What gives? How are you guys getting over 300 and some up to mid-300? My mileage ranges 16-17, occassionally 18 but that's it. Yea, I've got higher mileage than most (92k) but would that come into play? I'm stumped and a little aggravated to boot! Especially as gas gets more costly....