Ok, and those were the numbers that I got when I made my trip, whether it was higher or lower, I didnt do the math. I used what the Cobb AccessPort was giving me as the reading for average fuel mileage. But math cant lie, when my receipt says 11.2 gallons of fuel when I refueled, and I mark on the receipt the mileage I put on that tank so I can keep track of the mileage I put on my car from tank to tank or week to week (i reset my trip odometer every time i refuel). The math does read 33.39mpg, which could also be scewed by the fact I drove with the a/c off for a while, and I always drive 45mph in 5th gear cruising, which can skew the AccessPorts numbers. The 28 mpg was what it was reading when I was going 75mph 5th gear with CC on. I baby my car around town, and despite having 300 HP, I am almost never in boost, and most of the time a Prius will outrun me at the light. So a 35 MPG possibility on the open roads here in Pasco, at 45mph, 5th gear at 1900rshared_pm is attainable, and will skew the mathematics. I only wrote the AccessPort's number because that was a more realistic highway number, and not a fuel run on a tank of gas.