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Yup, a good lifetime average is harder to achieve with a do-it-all vehicle. Teresa's running average usually goes down our usual 2-up+luggage freeway/main road rides. Especially when the weather is unfavorable.
This time one way gave a really good average: 2.666l/100km, 88.2mpgUS for the tank that consist of this week's commute and ~180km of that way, including some extra slow rolling on the gravelly shoulder next to a several km long queue because of a bridge maintenance (mostly in P&G), but the weather was hot which always helps FE (and it doesn't help enduring our cordura gear).
The way back we got ~16C temperature, some slight rain and annoying sidewind, plus a sh*tload of books in the topcase. I wonder what FE we'll get this time (I suspect it'll be well under 80mpg).
Winter also makes FE worse, I usually get over 3l/100km (~mpg in the 70s).
At least this winter I was clearly better than a year before (radiator cover and driving style both helps), back then I got mpg figures in the 60s.
And high speeds are an enemy to good FE too. When I (very rarely, experiment or extreme hurry) exceed 80mph (speed limit is 130km/h=82mph here) on freeways I always get bad results. When I tried to often speed during a tank I got under over 4l/100km, under 60mpg...
And it's all in the lifetime average (which is 3.05l/100km=77.1mpgUS for Teresa).
And Ciliegia's (my girlfriend's bike, a Hyosung GV250) lifetime average contains much learning it take such a toll on FE that her lifetime average is 3.22l/100km=73.1mpgUS. Freeways are also unfavorable for the 250.
Their 3-month averages are much closer to each other.
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