Today, I covered 100 miles on mainly dual carriageways, wet roads, temperature about 6°C, two up. According to my ScanGauge E, I averaged 49.3 mpg, but on level roads, light throttle, and 40 - 50 mph, I was struggling to get the instantaneous mpg above 35. I was using my best hypermiling techniques, with little success. It is like driving through treacle. Wet roads and cold tyres are the death of fuel efficiency. 29 mpg in urban traffic and with short trips is pretty good at this time of the year.