Originally Posted by kam327
Is that a question for me? Again, my assumption is that you want to reach the stop at the same speed either way, so you can coast longer in neutral because your rate of deceleration will be less without the drag of the engine.
The rate of deceleration would be less due to the fact that you've de-clutched the transmission from the engine in neutral sure, but if you're going to have to stop, unless the point is much further away where you can use more of your momentum over a longer period of time to slow down you'll use a lot more fuel in the short run if you pop it into neutral a the same starting speed and end up going a lot quicker before a shortly approaching stop. So its a trade off.
For stop light to stop light stuff in town its probably better to adfso down in gear and not worry about putting it into neutral. On a rural road perhaps where you can coast a good long time without interfering with traffic and end up doing better over the distance in neutral then sure. Or coasting down from the end of a 70 mi/hr freeway becoming a 50 mi/hr highway in town with traffic lights before the city bit.
I used to coast down in neutral over longer distances in my manual car, but over the shorter ones its likely better to stay in gear and be able to more quickly change acceleration rates if need be. Of course with a manual you're always in charge of gear selection no matter what, and its not really that much more effort than popping it in and out of neutral.