Hi. What about ENEOS oil ? Actually they are the producers of the Toyota original oil..... I believe it is the same product, just a different sticker on the bottle.... and half price....
Check this out : http://www.eneos.us/products/eneos-t...eneos-eco-atf/

 

Seems good, but I would be very careful until you see it is OK in CVT transmission. Even Amsoil has no warranted oil for our CVT. I would call the manufacturer or email them and see what they say and if they will stand by their product in the Hybrid transmission.

 

The manufacturer will ALWAYS say only their oil is the one they recommend . 2 reasons:
1- they can not guarantee some other`s oil quality, even if on paper seems ok....
2- they want to sell their product...

 

Oh totally agree, but when I contacted AMSOIL they said their WS replacement oil was good for everything except the Hybrid...When a aftermarket manufacturer is that honest then I put caution before purchase of aftermarket fluids. If you go on Amazon they sell WS quite reasonably priced.

 

FYI Amazon has Toyota WS on sale for around $6 a Qt. I am tempted to stock up for the next change but a bit hesitant to do so since i changed it last year. (~20k miles)... my garage has a bit full of "stuff" that resembles a small auto part store...
I know for motor oil the < ~1 year of storage is recommended. I assume the same for Transmission Fluid..