i have read about many people using it for T-IV... it is rated for that on the bottle too & gets just as good of reviews as using it for WS. post a new thread asking for reviews or do a search, im sure there are pleanty.

valvoline & many other companies have multi vehicle fluids & are able to because they design them that way from the beginning. toyota does not, they have another company make a specific fluid for specific cars & years etc.

its not valvoline pulling anything off, its almost every major oil company out there that has scientists & engineers that study & design lubrication fluids, & even non major companies, walmart has a very good multi vehicle fluid that is WS & T-IV rated too.

viscosity is just one part of the fluid, just like engine oil, a higher quality usually synthetic can be thinner or thicker than a normal oil & perform just as good or better. for example, a high horsepower v8 engine that calls for a 10/40 weight oil can easily use a high quality synthetic 20/50 that will flow as good as a conventional 10/40 & has better cold pour ratings. also a thinner higher quality 10/30 will also still work fine, just maybe have a little lower oil psi, but because its thinner it will get in & out of the bearings better & cool better. point being, just because maxlife is a little thinner or thicker viscosity rating does not mean it wont work perfectly well in the trans while in operation.

US_Val_ML_ATF_EN.pdf - DocuSign CLM