I have a (new to me, but used) 2009 Sienna LE (the 2wd version). According to Toyota, the WS fluid is a lifetime fill. I'd like to know if the fluid is especially weak, the transmissions require more frequent fluid changes, etc.... When I pull the dipstick and check it, it seems fine and smells fine, it's not dark or brown or stinky. I have 55,000 miles on it (give or take). 50/50 highway/city, and we live in Wisconsin (so we go from -20F to 110F in any given year).
If you would change it, how? Drop the pan (and change the filter), or do a line flush. Would you use Amsoil? BG? Toyota? I generally like Amsoil stuff, I've never used BG. There is a shop near here with a fancy BG machine but they'll use whatever fluid is appropriate (and actually seem really clued in).
I want/need this thing to *last*.
If you would change it, how? Drop the pan (and change the filter), or do a line flush. Would you use Amsoil? BG? Toyota? I generally like Amsoil stuff, I've never used BG. There is a shop near here with a fancy BG machine but they'll use whatever fluid is appropriate (and actually seem really clued in).
I want/need this thing to *last*.