So on my first day from picking up my car I took the car on a drive for about 150 miles. On that trip the computer showed 29.7 Average speed about 70mph. My trip from home to work and vise versa the highway max speed is 55mph but i usually go around 60-65. I noticed my computer has dropped alot all the way to 22.4 mpg but I do mostly highway which confused me a bit. So yesterday I decided to play with manual mode and noticed that the ascent wont use the 8th simulated gear and stays in 7th unless you go past like 75mph. So i decided to leave my car in manual mode when highway cruising and just put into 8th gear, now my mpg has gone up to 23.1 and noticed that the meter is usually in green even when trying to pick up speed a little. Now I do realize the car is at a lower rpm like 1700rpm opposed to like 2100rpm and that can bog the engine but its not like im going Wide Open Throttle im just cruising. Maybe someone can give it a try and see if there is a difference.