Quote Originally Posted by Ry_Tower View Post
Hmm I guess they seem to think more gas consumption and more load to the brakes is okay. But I'll stick to what I think is best.
You'll just have to balance it. While stopping for several seconds, it should be ok to leave it in D. But if the stop is going to be longer than a few minutes (or if you've been stationary for more than a while already), putting it in N would allow you to relax your foot. With the brake lights off as well, the driver behind you would be thankful.

Shifting it between N and D too frequently will theoretically add wear to the shifter linkages, as well as some added wear to the pertinent clutch (with the engaging and dis-engaging). Clutches don't wear out when they're either fully engaged or fully dis-engaged. It's when they first make contact in which a little bit of slip happens, is when clutches wear a bit of their friction material. So the idea is to keep the shifts to a practical minimum.