I am looking to replace coolant and transmission fluid. Is AISIN the preferred brand other than Toyota brand?
Mobil 1 motor oil are often on offer at dealerships. Up here it's $10~12 per liter, vs $4.54~$6.00 for Toyota (depending if I buy bulk vs bottled): no contest.
ATF WS is one of the rare fluids where Toyota does not say "or equivalent" Get the real stuff. (and two washers)