Join Date: Oct 2016
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Just to chime in, I replaced the factory fluid in my 2014 MTX at 30k miles and it was pretty dirty at that point. I put in redline MTF 75W-80 and it improved the shifting characteristics of the car noticeably, especially when cold. I replaced the redline MTF at 60k miles and again it looked pretty dirty and beat up, it went in a nice pretty red and came out brown and dirty.
The dealer fed me the same 100k mile bullshitake too, so I just changed it myself. The car takes less than 2 quarts of fluid which costs like 25$, and the service is really easy to do. IMO, do it every 30k and have a transmission that lasts longer.
Also, I realize this is in the auto transmission section, but the MTX also doesn't recommend a change interval and clearly needs it, so the auto probably does too. I bet if you drain and fill the fluid once every 30k you probably don't need to change the filter as often.