I know this thread has been open for a while but just wanted to add my two cents. My mpg is 21.2 at 33 mph. I don't pay attention to the rpms when I shift, I pay attention to have fast I'm going. I shift from 1st to 2nd at 8mph, 2nd to 3rd at 16mph, 3rd to 4th at 25 mph, 4th to 5th at 28mph and 5th to 6th at 33mph. If I am ever going above 33 I'm always in 6th. Now that is about what I shift at. It works very well though. If you read your owners manual it gives you this very same info on page 5-19. It is the suggested up-shift sped for best fuel economy. And I do a lot of city driving with stop and go as I live in San Diego. Also my mpg used to be better but since I got my berk hfc and my berk exhaust my mpg has gone down to 21 as I love the sound my exhaust makes so I tend to really get on the gas more now then I did before. I hope this helps you out
