I realize the existence of this forum (which I love) is to discuss many topics which most people think we are crazy to even discuss. Here is my point of discussion: Unless I am really dumb and my reading comprehension is lacking, I don't understand how "everybody" equates 3309 and T-IV as the "same" or as "equals." I realize it might be that Toyota won't approve the 3309. I get that. My bottles of T-IV only reference "T-IV." This following is copied and pasted from the Mobil website stating the specifications and approvals of Mobil 3309. Specifications and Approvals Mobil ATF 3309 meets or exceeds the requirements of: Ford WSS-M2C924-A VW TL 52540-A According to ExxonMobil, Mobil ATF 3309 is of the following quality level: Audi G-055-025-A2 Saturn GM9986195 Toyota Type T-IV VW G-055-025-A2 So, if this is the case and 3309 is the same as T-IV, this means I can use T-IV in a Ford WSS-M2C924-A and VW TL 52540-A application. RIght? I mean, if they are the same?