Gearbox (spur gear Max: 2,000r/min) When adding to lubricating oil, which should be selected, LS bell hammer or LS bell hammer GOLD?

Considering the balance between cost and machine
We recommend normal type LS bell hammer stock solution.
For the first time only, the composition of the metal (crystalline metal/morphofus)
It is recommended to add about 10% in order to accelerate the conversion to a reliable product.
After that, we recommend adding 5% of the amount of oil each time you change the oil.