how long has the fuel in the tank, sat, and when you added fuel and began riding the bike, and then let it sit again the time table?
basically, you have not run thru 2 full fill's of the tank, with that mileage.... fill, ride, repeat..
the fuel in that '10, was turpentine, when you got it.. tank off, dump, refill is what I do to every bike I get for "service"
there is no option for being stinginess, throw old fuel away, and go forwards.
let us know how this works out.