What is your average miles per gallon ?
Tourer
Joined: Jun 2009
Posts: 261
Likes: 0
From: los angeles
My data is disappointing:
130mi 4.15gal 31.3mpg
144mi 3.78gal 38 mpg
139.1 3.91gal 35.7mpg
118.8 3.74gal 31.7mpg
155.5 3.1gal 42mpg (lots of freeway+ortega highway)
117mi 3.28gal 35.7mpg
138.4 3.87gal 36mpg
142mi 3.75gal 37.9mpg
131mi 3.79gal 34mpg
135.4 3.67gal 36.9mpg
35.92MPG average Stage 1 D&D fatcat.... I ride to and from work mostly, about 80% highway 20% street.
130mi 4.15gal 31.3mpg
144mi 3.78gal 38 mpg
139.1 3.91gal 35.7mpg
118.8 3.74gal 31.7mpg
155.5 3.1gal 42mpg (lots of freeway+ortega highway)
117mi 3.28gal 35.7mpg
138.4 3.87gal 36mpg
142mi 3.75gal 37.9mpg
131mi 3.79gal 34mpg
135.4 3.67gal 36.9mpg
35.92MPG average Stage 1 D&D fatcat.... I ride to and from work mostly, about 80% highway 20% street.
Outstanding HDF Member
Joined: Nov 2007
Posts: 2,289
Likes: 22
From: Beautiful Downtown Burbank
I have no idea what fuel mileage I get, and honestly, I dont really care. The bike runs till it needs more gas, I put some in, and it runs some more. It hasnt left me stranded, even when I asked it to go 180 miles to get to the next station. So who cares what mileage you get, as long as the bike goes, and you go along for the ride.
I usually average about 31-34mpg depending on how and where I ride. I would believe that if the OP was getting 57mpg his bike is running so lean that it is melting the pistons and will not be running much longer. Mine stock was getting close to 45mpg and that was so lean that it turned the inside of the stock mufflers white before I rode it 500 miles. The exhaust are now a nice dirty black inside 
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Tourer
Joined: Jan 2009
Posts: 342
Likes: 0
From: Wasteland Mi
I Avg 45 mpg in the Summer
Winter Blend gas here in Michigan I avg. 35
56 cruising at 60-65 on Reual Highway's
08 FXDWG Arlen Ness super sucker II, D&D 2 in to 2 Pipes with a Generic Bull **** map from the Stealer.
Milage was the Same with the S/E Air Cleaner and V&H Long Shots.
This is Aggressive in Town and Highway Ridin.
At 80 MPH and 3000 RPM my A/F is at 14.3 I've had it on the Dyno pulling A/F runs and the map is Lean. Just waiting to install heads and cam's before a Real Tune
Winter Blend gas here in Michigan I avg. 35
56 cruising at 60-65 on Reual Highway's
08 FXDWG Arlen Ness super sucker II, D&D 2 in to 2 Pipes with a Generic Bull **** map from the Stealer.
Milage was the Same with the S/E Air Cleaner and V&H Long Shots.
This is Aggressive in Town and Highway Ridin.
At 80 MPH and 3000 RPM my A/F is at 14.3 I've had it on the Dyno pulling A/F runs and the map is Lean. Just waiting to install heads and cam's before a Real Tune
Cruiser
Joined: Apr 2009
Posts: 133
Likes: 0
From: Western New York
I ride a lot of country roads in Western New York so I don't get into 6th gear often. My average is around 40 mpg, that's what I've come to figure on getting for my stock 2007 FXDB. That's with windshield and a svelt 275 pounds on it. 