I often start in 2nd gear.
I shift when I reach 2000/2100 rpm, or when the next gear will be >1400 rpm when I land there.
Really, though, I do 2nd and 3rd so fast, get into 4th by 20 mph (32kph). The shift into 5th at ~35 mph (55 kph).
1400-2100 rpm is the best range on my car, and likely many others. The lower end of that is best for cruising, the higher end for accelerating.
__________________

11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
|