Short answer: nope.
It would be up to each driver to enter their speed info in the comments of their fuel log entries. Which would be like herding cats.
EG: most of my driving is on quiet back roads.
If there's nobody around, I'll cruise at 5-10 km/h below the limit of 80 km/h (50 mph). I record my tank average speed in my fuel log. BUT... the ScanGauge typically shows a much lower average speed for the tank once it factors in a bit of city driving and stops. (The
SG also calculates avg speed based on elapsed time, not a moving average, meaning those minutes spent stopped for lights, trains, etc drag it down.) In my case, it's actually not a very useful number to talk about.
Maybe what you really want is in this thread:
http://ecomodder.com/forum/showthrea...you-15182.html