Here is a bigger cross section of pregen stick shift Insights showing a few fringe hypermilers over 70 mpgUS. The best I could get at 65 mph and while drafting was 68 mpgUS in the summer. PnG only serves to cremate your battery in a mild hybrid so I didn't do much of that. Most normal people get 57 mpg on the highway in a stick shift Insight. My geared but otherwise stock CBR250R is over 90 mpg for the same conditions and normal people get about 75.
.
.

.
.