I changes the CVT fluid in my car on Monday... I used this Eneos CVT fluid that us full synthetic. My car had gotten a bit loud in the past couple of weeks at low speed. The fluid that drained out actually did have some metallic shimmer to it as it was on my hand... That was note worthy because the first time I did a drain and refill it did not have that. The car has been quieter than it was before I added the Eneos CVT fluid. I am very impressed with this fluid. I am going to do another drain and refill in a couple of weeks... The other drain and refill had about 5k miles on it. I bet the first drain and refill did do some cleaning and that is why I saw what I saw on my hand as it drained out. The car is running quieter at low speed and accelerates very well.