Greetings, everyone: My dad's '92 Toyota Previa with 86k is due for a 90,000 mile service. As part of today's inspection to determine what work will be needed, I checked the condition of the transmission fluid. The fluid looked like motor oil. Not used motor oil, but somewhere between new and used. This did not surprise me as the only services the transmission has seen are partial drain and refills at the 44k and 68k marks. Therefore, either a cooler line flush or three back-to-back refills are in order, right? I checked the manual for the recommended fluid type. As an older Toyota, the manual said Dexron II is recommended. Since this is an older van, I'm not interested in spending serious $$$ on transmission fluid. What fluid would you folks recommend? I was thinking about using an unlicensed Dexron/Mercon type product. At Walmart, I saw one-gallon jugs of Castrol Domestic Multi-Vehicle for about $12. The specs for this fluid look identical if not a bit better than the Castrol Dexron-III(H) data sheet that I still have. Has anyone tried the Castrol Domestic Multi-Vehicle ATF? Any positive or negative experiences to report? Thanks!