yeller wrote: ↑Fri Jan 01, 2021 9:07 pm
Since mine drained 4 quarts but holds 10, I'll change it once per year instead of the dealership-recommended 60k.
For the initial change 60K is okay for most people, depending on driving habits. It's way too long for subsequent changes. The reason is exactly what you said, you're only exchanging half the fluid or less. My recommendation is 30~35K if you're a normal driver, 20~25K if you're a leadfoot or routinely climb steep hills, 40~45K if you drive like grandpa.