For what it's worth, here's my question to Mazda USA and their reply back to me...
To : MazdaCustomerAssistance@mazdausa.com
> Subject : Ownership & Maintenance - Service
> Date : Sat, 26 Feb 2011 19:14:13 GMT
> The Mazda maintenance schedule and manual for my 2009 CX9 doe not mention anything about changing or flushing the transmission fluid. The dealer tells me it should be changed every 30K miles, or when dirty. What is Mazda's official recommendation on proper transmission fluid maintenance? Leave it alone since it's not mentioned in the maintenance schedule or owners manual (even if it looks dirty), or have it changed when it appears dirty (no longer pink like new fluid)? I don't want to spend $150 every 30K if I don't have to. Thanks for the information.
Thank you for contacting Mazda. I understand you are inquiring about the transmission fluid for your 2009 CX-9. Mazda would advise to have your tranmission fluid checked two times a year. Like for instance Spring and Fall. If at the time of inspection the color of the fluid has changed or there is burnt material Mazda would recommend replacement. Miles or time is not a factor in the replacement. Thank you for your time.
Mazda Customer Assistance, Representative
Anyway...thought I'd put it out here so people know Mazda's "official" recommendation on the matter (or at least that of the customer service rep that relied to me, which I would assume is representative of their "official" recommendation).