not necessarily

来源: 于 2009-10-16 11:28:12 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

in N gear: higher rpm, lighter load (so less fuel injected?)

in D gear: lower rpm, but with load

It's very likely a wash (sub 1% difference?)
so why bother? and it likely reduce the life of your tranny.