STP (before BITOG)
Seafoam (before BITOG, only as 10 min flush)
Mag 1 Octane Booster (used in my motorcycle)
STP Octane Booster (used in my motorcycle)
Liqui Moly are the best oil additive company around, although they do not make additives for auto boxes and there are other companies in the US that make good fuel additives.
If by "auto box" you are referring to transmissions, they do have an ATF additive (for use in auto trans and in power steering pump) - https://www.amazon.com/gp/product/B004X63XVU/