With over 4,000 on the clock I've had a chance to try things out. I'm finding that on rolling hills or headwinds, 5th gets better MPGs than 6th in the 60-70 MPH range. I've also learned passing needs 3rd. The possibility to loose grip without beating the clutch up is very minimal on rainy or dry roads. Lastly, Reverse could be a little lower as I find I have to slip the clutch more than I like.