The furthest I recall going is about 5km. On a flat side road in the Fraser Valley. Going about 60km/h. Next time I get a chance I'll measure exactly.

I have found the same thing as mentionned above that on certain days you can get outstanding mileage. I have seen the needle stay at around 4l/100 for long periods going about 80km/h on Zero Ave. Then the next day it won't do it. Conditions are similar but results are different.

I drive Chilliwack to Richmond BC everyday and average 5.9l on the display. I have found the display on my car to be very accurate, within 0.1l of measured consumption.