I
don't recommend this when the host is
NOT a large BOX truck or 18 wheeler that can't possible stop faster than you.
How this relates to distance varies with speed. How you do it at speed is look at the trucks rear bumper and a mark on the road. When they pass count "one thousand, two one thousand " until the front bumper of your car reaches the same mark on the road. You want to make sure it's no less than 1 sec. I like and recomend a tad over 1sec
My scan gage and trips testing this hyper milling technique has told me this:
- 1+ sec drafting is good for 5 to 6 more mpg (than not) at 55 to 70mph
- Never go more than 70 if eco is a goal
- Greater than 2sec is maybe good for 1 or 2 mpg
- less than 1 sec is unsafe and will not leave you time to dodge anything or brake safe. It's also a breaking a DMV law in most states.
- If you can't and do not want to stay focused when doing this back off and don't. If you are day-dreaming and discussing stuff with others in the car, don't do it. You have to pay attention all the time.
- You can get 44mpg in a MT Sport at 65 to 70 mph doing this every time.....
Hope this helps
