[brucepick]

At the risk of going off topic (too late!!) - - -

I've been using P&G on the interstates here over the past couple months, varying between about 55-70 or so. We have hills so I adjust technique as needed for terrain, but still P&G nearly always.

Admittedly traffic in my area is generally light. That said, I can see that other drivers are confused by my driving technique and they get frustrated. I'm a bit heartless that way. Too bad for them, they can pass me if they want.

I also use P&G when traffic is stop + go, or very slow and moving in pulses. Leave enough room ahead to coast through available space, accelerate when traffic demands it. Of course brake when traffic demands it - but if you can leave space and watch out ahead, you will be braking far less than other drivers.

Yes it's tiring, but very good for fuel economy.