Originally Posted by SatinSilver
I recently asked one of who I consider the most knowledgeable on here about ATF from WM for an 05 Matrix and below is their response:
Originally Posted by XXXX
Get this one it meets Toyota spec. Basically Toyota specs dex/mercon(V) not low viscosity fluid.
https://www.walmart.com/ip/Super-Tech-MERCON-V-Automatic-Transmission-Fluid-1qt/17134874
Super Tech MERCON V Automatic Transmission Fluid, 1 Quart:
Uses a unique combination of conventional base stocks and an advanced additive technology
Meets the performance requirements of Ford automatic transmissions calling for MERCON V fluid
Suitable for use where the following automatic transmission fluids are recommended:
Chrysler 3 and 4 (except C-604 transmissions)
DEXRON II (E, F)
DEXRON III (G, H)
DEXRON VI
Honda Z-1
MERCON
MERCON LV
MERCON SP
Nissan Matic-J
Toyota T-IV or Toyota WS
For my 1985 Corolla that specs GM Dexron II, I've always used Valvoline Dexron (conventional Dexron IIIF, Dexron IIIG, and Dexron IIIH) and I've been using the Valvoline Dexron VI Full Synthetic (thinner but shear-stable Dexron) since it was introduced many years ago. My transmission runs like clockwork.
For the newer Toyotas, I wouldn't go with anything other than the Toyota Genuine WS ATF, Toyota Genuine FE CVTF, and Toyota Genuine TC CVTF. They are proprietary formulations and not licensed to blenders.
It's disturbing that Valvoline MaxLife etc. are one-size-fits-all ATFs. California is forbidding them from making that claim. They are obviously off-spec because different OEM specs conflict. Why would you run an off-spec fluid in your car and think it's OK?