I just filled up my 07 with 23 gallons of 93 for the first time and I have noticed the extra power. It took a little bit to work out the 2 gallons of 87 I had at the bottom, but now I can feel the 93. I fill it up until I can see the gas right at the opening. It's pretty sweet and its making me want to slap an intake and a nice throaty, semi italian sounding exhaust on there so I get all the horses awake. The gas paired with the cooler night time air gives it a nice bump. Even got all four spinning in the rain the other day and boy was I excited.