It seems that Mobil 3309 is the spec for this car. I can get T-IV for about $6 per quart. Maxlife or Castrol IMV would be about $5. Any opinions?
I would just go with the T-IV from your Toyota dealer...It comes down to this: do you trust the fluid maker to recommend what transmission to use it in?
while Castrol IMV says that it meets several specs, those specs don't include JWS-3309 or T-IV...Castrol, however, recommends it for use in transmissions with those specs...same story with Max-Life...Max-Life is recommended for applications which require T-IV.
Not saying T-IV is the best ever...but then you don't have to answer the question above...