[ScottC33]

So let's assume you're the only guy on the freeway, and you have the ability to coast safely from 60 mph all the way down to 20 mph (just as an example), then speed up slowly to 60 mph again (and repeat)? Would that produce the highest mpg, all other things being equal? Or is there some science behind the theory that you should coast only until you hit some predetermined mph before accelerating again?

Obviously, the more you coast (and slower you travel) in neutral, the more fuel you will use to speed up again. What are the current thoughts regarding how far/long you should IDEALLY coast before speeding up again?

I'm trying to figure you whether people coast until hitting 50-55 mph ONLY BECAUSE it's unsafe to go any slower on the freeway, or because there's some other fuel-efficiency issue involved.

This is not an EOC post. All coasting, for purposes of this question, will be done in neutral.

Thanks so much for your input.

Scott