|
I do it from time to time. If I find a truck going sufficiently fast, and one that is sufficiently stable and the traffic is sufficiently minimal, I'll draft for miles at a time. Sufficiently.
I stay back about 40 feet or so, just enough to give myself some reaction time. At 75MPH my factory fuel economy meter (which has proven to be very acurate based on fill up calculations vs. gps mileage) will go from about 26MPG WAY UP to 32 - 36MPG. The closer I am and the less cross wind there is, the better the figures. Also, when I can find a truck that is going at the EXACT same speed as one of the settings on my cruise control (it eats mileage to make miniature corrects over and over trying to match another vehicle.)
It's not often that all these criteria line up but when they do, it can be high mileage coasting for MILES.
|