I drive a 2018 Toyota Corolla IM with 141, 000 miles. I have never changed the CVT fluid. I ask the serious advisor at the Toyota dealership when to get it changed and they say not to. Even printed out a document of intervals indicating when it should be changed and it only lists if the vehicle has been doing a lot of Towing. I drive the car a lot across the State of Florida to see family just why it has so many miles on it. I want to keep the car for another 150,000 miles. I'm concerned not sure what to do?