Used TOYOTA WS Automatic Tranny Fluid analysis :

[sbergman27]

Originally Posted by Hershey

So, what's your opinion of changing A.T.F. in a YARIS earlier ?

It couldn't hurt. The power train warranty is 100,000 miles, so apparently Toyota is confident that the oil will get it through that period.

AMSOIL A.T.L. ( www.amsoil.com/storefront/atl.aspx ) can be used in place of the WS .

As I've mentioned before, the Scamsoil company's penchant for using the results of totally inappropriate test procedures (e.g. four ball wear test... for engine oil) to "prove the superiority" of their products, substantially compromises their credibility, in my eyes. I wouldn't buy cooking oil from those folks, let alone trust their transmission fluid. Toyota's WS is known to be a quality fluid. Personally, I would use that.

-Steve