I haven't ridden a lot this year...just under 700 miles, in fact. However, I have noticed that I am regularly getting 44-45 mpg now, when last year I was getting a steady 43 mpg. The weather hasn't exactly been warm here, either.

Perhaps I am riding a bit differently, I dunno...seems as though I am actually revving the flat-6 a little higher than in the past in between gears...perhaps that is actually making the bike a little more efficient?

The only other factor is that I switched to Mobil 1 oil late last year for my annual oil change. I didn't ride it all that much following that oil change, and the weather was colder, so perhaps those two factors made it so I didn't notice an uptick in engine efficiency at that time.

How could synthetic make THAT much difference...I know it supposed to increase mileage, but I figured it is the tenths and hundredths place, not the ones place.