[deadrx7conv]

BTW. T-IV is also a world standard.

I find that WS shift quality is so much better then T-IV.
UOA numbers haven't been compared. T-IV is just as poor of a performer. Actually, T-IV looks worse then WS.

Any universal/multivehicle ATF mentioning T-iv/3309 should be used in place of T-IV. RoyalPurple, Mobil1, Amsoil, Castrol, Pennzoil.... have ATF for you.

Concerning WS, products are available from Amsoil, Redline, Amalie....that are thinner at normal operating temperatures for the improved MPG.