Well boys and girls I finally got around to replacing my stock air filter on my 09 650 standard. The bike has just under 20,000 miles on it and wanting a cleanable air filter, I bought a Bike Master air filter. The filter came preoiled and fit right in the airbox with no problems, here is what has amazed me. I ride like an old geezer ( basically because I am one) and my mileage averaged 55 - 57mpg at 55mph depending on weather conditions, my bike now is averaging between 59 - 61mpg for the last three tanks of gas at the same speed. There have been no other changes to the bike other than the air filter change and I was wondering if anyone else has had this experience. Needless to say I'm a happy camper.