Got this off the Q&A at manufactures of the auto boxes web site Jatco LTD.
Q. How often should the oil be changed in automatic transmissions?
Our products basically do not require oil changes.
There are CVTs, however, that signal the need for an oil change and you should therefore check the handling manual of your vehicle for details.
ATF change?
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- dandywarhol
- Supreme Being
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Re: ATF change?
Mazda recommend 25,000 miles for the Bongo - I think I'd go with that info - save a grand for other things in life 

Whale oil beef hooked
Renault Lunar Telstar
Yamaha TD1C 250, Merc SLK200, KTM Duke 690
Renault Lunar Telstar
Yamaha TD1C 250, Merc SLK200, KTM Duke 690