Ok. Here's the numbers from my roadtrip. Distance: 840miles, Avg. MPH: 62.2, Avg MPG: 24.8, avg Octane: 91. Engine size 3.6V6. Total miles on car: 17400. Age: 1 year.
Not to shabby for a car that weighs 4000lbs. Still the most comfortable car I've ever driven on the Interstates.
Now for the caveats: Avg. Speed accounts for dead stops so you might want to wait until you're up to speed on the Interstate before resetting the counter. Same for MPG. I'm not sure how Driving Range is calculated but if it takes into account mpg using the calculated average speed, then its not accurate as any stop will skew the real average speed value and throw the calculation off. I would imagine the calc. goes something like avg.mpg x gallons in tank so you can easily see how that number would skew after a stop. Although its not realistic to do a road trip without any stops but something midrange, say 100miles or less, you might want to try resetting the values after you're on the highway.
