Pulse & glide not always better than steady speed in-gear?

[Fat Charlie]

Bump starting killed my clutch after only 41k miles! Of course, I had about 166k of rather sporting use on that clutch when I started EOCing...

Bump starting will wear it faster than you already are. If you're rough on clutches, this is bad. No problem if you're smooth. If you want to become smooth, it's more practice!

[accord_minded]

Regarding P&G at different speeds, I still have an improvement of 2-3MPG doing P&G at higher speeds over non-P&G. This is all highway, with little traffic volume. I usually am pulsing to 75 and gliding to 65 (sometimes 60). DWL, pulsing as I crest a hill and gliding down. I know I would do better at lower speeds, but can't go slower without being a hazard.

Anyway, my experience is that P&G still helps at higher speeds vs. no P&G at the same general highway speeds.

[Striker2237]

Pulseing down hills after gliding up them works very well in my truck because of the weight, doesn't slow down too much and picks up speed very quickly at only 1700 rpm

[toc]

Just another thought - The map might be leaner at steady cruise, or using O2 control might keep it 'at it's leanest' if the map has no leaner than 14.7 (thus making closed loop best).

And of course, lean burn (if supported) will likely not be entered if you are pulsing and gliding.

There won't be a hard and fast rule for every car - though the principle for pulse and glide is sound - using inertia as opposed to steady power.

[cowmeat]

And of course, lean burn (if supported) will likely not be entered if you are pulsing and gliding.

That's why I only hit the kill switch when coasting to a light, or down a (tiny Florida) hill. My main focus is getting into lean burn and staying there. Check out the maps below to see how many times I have modified my route in search of one that offers the most time in lean burn.

There is no direct route between my house and my job unless I strap on a jet pack. The shortest routes have the most stop-and-start traffic, which kills the mpg of an Insight. The long straight stretch of I-4 takes me miles out of the way. I have tweaked my route multiple times since buying the Insight, and when my wife carpools with me I also have to drop her off, which throws another point onto the route.