I apologize for lack of information, I'm riding a 2012 RS with around 13K miles on it. I have been using "Mostly" the same station and have been using the same grade of gas, I run straight regular because of how much cheaper it is. I know the recommended is 91 I believe. I've checked my oil, level is good, clean, and doesn't smell like gas so I don't think that's an issue. I haven't run any stabilizer in it, and I didn't know anything about a "winter-blend" of gasoline so that's news to me. Before I was probably able to get between 130-170 to a tank, depending on if my wife was with me. I've checked the air pressure and I used to run them around 25-30 well the book calls for 15 in front and 30 in back which is what I run now. I just had a new battery put in a few weeks ago and I do most of the service myself due to the high cost. The only thing I haven't checked, and am unaware of how to check is the fuel filter, and I believe i had a new air filter put in when I had my vacuum line bust last year (That job a dealer did) and I think they replaced it then so I wouldn't think that it would be bad yet. Hopefully this helps with the information, sorry again for lack there of in the beginning.