Tom, I would venture to say that the poorly built worm gear / worm setup on these saws would cause the consumption of the worm gear long before the 90W gear oil would. But I guess the right oil is the right choice, for any situation. 
Busy Bee 12-36 lathe, Busy Bee Mill drill, Busy Bee 4x6 bandsaw, Homemade 9x17 bandsaw, Ad infinitum.