How often should I be changing CVT fluid?

[BarryB333]

Contrary to what is recommended by Subaru in regards to changing the CVT fluid, I had a Subaru mechanic tell me that changing it more often than recommended is a good thing as it helps avoid a CVT failure. I did some research and it appears that many seem to agree with him. And so...how often should I be changing out the fluid? I just purchased my first Subaru (Forester, Touring...2020) and am wondering what kind of schedule I should use for replacing the fluid. Suggestions??? Any other maintenance suggestions would be appreciated as well.

 

[msilverm]

3 years or 30,000 miles. That is Subaru Japan recommendation.

 

[BarryB333]

I'm aware of what goes on in Japan. What I'm dealing with is a Subaru dealer that is insisting that it's not necessary and that there is some risk in doing it every 30K miles. I'm tending to agree with Japan.

 

[msilverm]

What is the risk? I would find another dealer or service/repair shop.

 

[scubazteve]

If the fluid hasn't been touched I wonder if it's more of a liability or "don't ask for trouble" mentality? As in stirring up solids, dissolving and redopositing varnish, etc?

Not to mention anyone noticing a small change in "shifting" or anything that smells different will come in to have it checked?

Also with the transmission self learning or manually teaching sounds like a good opportunity for finger pointing.

Personally I am in favor and do the fluids ahead of schedule if doing other work.

I do want to ask.... Any idea if all the controls are the same for other markets, as in the same module and same firmware/software?