gear lube vs. tranny fluid

Exactly ^^^^^^ but no matter how hard you try to tell people, they always gotta latch onto the latest and greatest gimmicks. I say let um waste their money.

The trick is to take advantage of better lubricating technology without falling for the gimmicks.
There isn't a reason in the world to allow more wear just because a 40 year old book says to use what was available 40 years ago.