While riding the past few times more especially tonight on the interstate Ive noticed the heat is stronger than I ever remember it. Just turned over 40k miles so I'm thinking its probably time to do valves and timing chain slack adjustment checks, spark plug checks and whatever else the service manual says for that mileage. I'm getting really low on fuel but I was determined to stop at a certain place to refill because I know they have 100% gas. Thinking back when I got fuel last, I purchased non ethanol but not super unleaded from a Valero gas station . It seems quite a few gas stations in my area of the world are ditching super unleaded and only offering regular with or without ethanol. After refueling with Phillips 66 super unleaded and getting back on the interstate I noticed immediately that the heat had dropped way back. Too good to be true but 20 miles later the heat was still noticeable less than it was and the bike seemed a little more responsive. So got me to thinking maybe some of the heat issues some of us have are poor fuel quality related. It would be interested to see if others on have the same finding as I did. I was watching some Ford Ecoboost engine videos on you tube ( because Im thinking about buying an f150 with the ecoboost engine because I hear the 2.7 engines are pretty solid little engines and well..) ANYWAYS.. one of the mechanics was saying that Shell and Chevron fuels are the best on the market. I duno how true that is but I'm planning on looking into it some more and my next fill up will be at the shell station.