Originally Posted by dave1251
Originally Posted by The Critic
The car should be using WS or the closest application specific equivalent, such as Idemitsu TLS-LV.
Please eliberate. Because your response makes no sense. It has been beaten to death on here. Manufacturers have bids for ATF's then blenders blend to the manufacturers performance specs. Then blenders make the ATF. Most ATF's are nearly identical with basestocks and additive packages.
You may depart your high horse at anytime.
There is a difference with Japanese ATFs like Toyota T-IV/WS and Nissan-Matic S/J/K - frictional coefficients to keep the TCC happy when the PCM/ECU commands it via PWM and shifting.
It's a good idea to stick with OEM fluids during warranty - but all the better "universal" ATFs(MaxLife/VersaTrans/PPLV ATF/Castrol IMV) meet the JASO M315-1A spec which the Japanese OEMs consider acceptable and many Toyotas do fine on MaxLife. Go down to page 102 here, it's a presentation by a Toyota engineer.
http://www.jalos.or.jp/onfile/pdf/2009_DEO_Seminar.pdf
Originally Posted by Toyota engineer at a JASO seminar
The Japanese ATs need genuine parts ATF
or superior ATF in both anti-shudder
durability and frictional characteristics.
And these important properties are specified
in JASO M315
While OEM is best, MaxLife and Castrol IMV to name a few meet the "superior ATF" requirement - and Aisin also sells such a thing in Japan, so does Eneos. I've used MaxLife and Castrol IMV(not the new stuff) with success - except in my parent's Sienna that had a little shift flutter that T-IV resolved and I doubt Valvoline tested it in a hybrid application - while a Toyota/Ford hybrid unit is mostly splash lubricated for the diff/planetary gears for the power-split device and reduction gear, there is a oil pump and circuit that drips ATF onto the electric motors.