Originally Posted by TboneZX3
I agree with TiGero. Thanks for all the work, but I'm not sure how good the data are if you have no idea what the driving trends were for each of these vehicles. i.e., city vs. highway driving.
It doesn't matter what their driving habits are, as long as each stays relatively consistent. Yes, I'm assuming that someone didn't do mostly highway driving for the first 20 tanks and then completely switch to city driving for the next 20 tanks, which would artificially trend their MPG down. These graphs are intended to give a glimpse into the perfomance of each car assuming they're driven by the same person in relatively consistent driving condtions (meaning mostly city, mostly highway, or mostly mixed). Even a couple of tanks of pure highway when the driver otherwise drives all mixed is not going to have a significant "pull" effect on the trendline.