So the 200 just hit 120k and my plan is to start doing regular ATF fluid drain and fills, say every 20k-30k or so. I have some time on my hands today and Im wondering if I just should just go pick up some Valvoline ATF from Walmart, which says it is suitable for Toyota WS applications, and start today or should I order a bunch of Toyota WS off Amazon and replace with that? Can Valvoline ATF be safely mixed into the old Toyota WS?