Hello Codylehr23 and welcome to the forum.
Originally Posted by Codylehr23
CVT oil is not cheap. There are alternative lubricants available that are cheaper than what Mitsubishi sells. While I have a 5-speed and not the CVT, I'm not sure it's a good idea to mix lubricants - especially if you are doing it yourself. The main reason why I say that is because I understand automatic transmissions have very specific requirements for additives. Unless there is a way to compare the additives of one against the Mitsubishi fluid, I don't see a great benefit of saving a small percentage of the cost. Especially if it's a DIY job. Doing it yourself is a cost-saving measure - use the savings toward the purchase price of the right fluid and rest easy not worrying if future problems are due to someone else's fluid. That's just my opinion.
That being said, Fummins maintains a fleet of Mirages used for deliveries and uses aftermarket fluids. He's had a couple of CVT failures but doesn't attribute those failures to the fluid. Read more about his adventures here:
CVT Failure (at 304,000 km / 189k miles, delivery vehicle)
Cvt failure at 223000kms / 138k miles (courier car, 2nd CVT failure in the fleet)
The first thread includes info about the CVT filters. There are two.
More reading on CVT fluid change:
How to: change your own CVT fluid / oil
More thoughts on the Mirage CVT fluid:
The 2015 Warranty manual has no entry for automatic transmission fluid changes for normal service. The severe service says to check the fluid condition every 15,000 miles and to change it every 30,000 miles. Without knowing your driving conditions, it's worth noting that you are beyond twice that mileage.
The Service manual details how to do this work. It can be difficult to extract all the fluid out of any automatic transmission. I can see how some owners would rather leave this to a dealer's service department or another professional transmission shop.
I hope this helps. And hopefully more CVT owners who have gone through this will chime in and help you with your questions.
Sorry for not getting back to you sooner. When I saw this, I was browsing on my phone which doesn't help making a detailed response like this.
We have family in Pullman, on the Palouse. We really enjoy our visits to Washington state.
View my fuel log 2015 Mirage ES 1.2 manual: 50.0 mpg (US) ... 21.3 km/L ... 4.7 L/100 km ... 60.0 mpg (Imp)