I have just inherited a 2011 Toyota Prius. I've been doing a bit of reading on it and am comfortable doing a DIY atf change. From what I've read these are CVT transmissions that use Toyota WS fluid. It looks to use around 4-5 quarts an oil change and uses a drain/fill bolt like a differential. So my question is I was going to use Maxlife atf but I see on the Valvoline site it says not compatible with CVT transmissions. Is there another readily available fluid I can get at Walmart that's equal to or better than the OEM stuff or would my best bet be to contact the dealer for WS? If I do get the OEM WS fluid will there be any dealer additives and such that will be needed for CVT?