Best milage 45.3, cruising no more than 75mph, on good gas,2008 Ultra.
&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&n bsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbs p\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\ \;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\; &nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&n bsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbs p\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\ \;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\;&nbsp\\ ; Mr_Bill

 

I get around 42 - 45 with mine

 

Been avraging 39-42 mpg, 2 Up. Headed on a trip from NE Wis to Louisville Kentucky during 4th of July week. I'll keep track and report back but wont be surprised to see 42+avg for the trip. Have Pre Emiss SE Slip-ons, SE A/C and Sert with no dyno tune.
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mps

 

I was pleased with my 46.75 mpg this past Sunday after a 130 mile afternoon ride on 2 lane hills and twisties, speeds of 45-55 and some stretches of 60 mph.&nbsp\\; One of my riding buddies filled up his '02 Heritage both before and after the ride at the same time I did.....he got 56 mpg!!! And he's not even using synthetic oils.

 

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You know they can claim "higher efficiency" all they want, but in my opinion the only thing synthetic oils are really going to do better than petro-based is resist thermal breakdown.&nbsp\\; In a harley [or any air cooled motor], that is reason enough to spend the extra money.