I wish I still had my Cub 50. I don't remember the gas tank size, but it calculated out to carrying me 142 miles/gallon. I only weighed ~130 lbs back then, and the Cub topped out at 35 mph, downhill. It barely managed 25 mph on uphills. It wouldn't do nearly as well on the uphills carrying Frank, but its downhill speed with Frank might be something else again.
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Darrell
Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
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