Why is Honda so adament about AFT-Z1 transmission fluid? My owners manual says only to use Dexron III in an emerency and have it flushed out. It actually says "drain and refill it 3 times". What's the deal with this? I would normally use Mobile 1 synthetic trans fluid but this harsh a warning has me thinking this may not be a good idea. The manual has no such warnings about engine oil or differential fluid.
It does have the same warning about the power steering fluid, coolent and brake fluid.

Are the real differences in this stuff?