Originally Posted by def
I would not use an additive in your gear oil unless it is specific for use in gear systems. The product you describe is not.
I just added Guard Dog moly for gear oil to my transmission, it shifts much smoother now.
Comparing a moly additive which is designed for gear oil to adding mothballs to gasoline, which they are NOT designed for is not a valid comparison.
BMW had added moly to the gear oil when the bike was new, so I see no problem with it.