"變速箱油"

the concept of "變速箱" in Chinese is kinda ambiguous - it could be "automatic transmission" for auto trans, and it could also mean "gearbox" for stick shift. which one is yours?

if your car is equipped with an autotrans, atf change is far overdue. recommended change interval is 30kmi (yours is already 125kmi).

now if yours is a manual transmission, the oil is petro based, eg. 75W90 Redline, which lasts long. you can change it around 100kmi to 150kmi.

Without clear specifications, you leave too big a room for speculations...