I don't see how anyone can shift under 2k, except maybe shifting into 4th or 5th on a downhill. It feels waaay to much like I'm bogging it if I shift that low.
I shift between 2500 and 3000 rpms, and occasionally I run it to 4k to keep my secondaries from gunking up. I get good gas mileage, and try to avoid slowing down and/or downshifting and such when cruising, and I get pretty stinkin good gas mileage.
That's how I usually drive, and it may or may not be the best way.
-Peter
