回复：减少刹车磨损，是次要的，重要的是避免刹车过热而失效。

来源: 于 2013-11-23 09:20:42 [旧帖] [给我悄悄话] 本文已被阅读：次

顶! You mainly use this for down hill driving to void overheating brake rotor! You might wear out the shift early if you use this too often on automatic vehicle. It may be not worth doing it.