I recorded my personal best fuel efficiency yesterday, on Mary Ann's 2005 Burgman 400. It was 89 mpg (Imperial units), which is approximately 75 mpg (U.S.) or 3.15 litres/100 km. This achievement was just in time for the Burgman, as we were already shopping for a replacement scooter, but now I think we will keep the Burgman for a few more years at least.
Mary Ann originally liked the Burgman 400 because of its gas mileage. Last summer, it averaged 83 mpg (Imp) travelling from Ontario to the west coast and back.
The actual 89 mpg result was on a 135 km. trip from Kitchener, Ontario to Dutton Ontario. As I left Kitchener, I filled up at a Petro Canada station. There was a 5-10 kph north wind, while I was going south west, so that helped a bit. I did the first 37 km on city streets or country roads at 60-80 kph. Then a distance of 87 km on the limited access highway "401" at 90 to 110 kph. (These are indicated speeds, so I may have been going 10% slower.) The last 18 km were on a country road at 60 kph. I may also have benefited from following in the air wake of some slower trucks on the 401. But I was not "drafting", I hope I left enough space to be safe. Normally I leave more than 3 seconds space, but at times I was not leaving that much.
So now I find it more believable when I see on the eco-modder website that a Burgman 400 rider claims 101.9 mpg (Imp) for 90 days.
My next goal would be to try and get 100 mpg going to Dutton, by avoiding the 401. I think the Burgman would get its best economy at 60 kph, not 100. However, that trip will take much longer than the very reasonable 1 hour and 45 minutes I took yesterday.