Re: Automatic Transmission Fluid
Keep in mind that the '07 and newer Sienna specs Toyota Type WS ATF and I don't believe that there is an aftermarket fluid with that specification. I also heard that there is a service update that specs WS fluid for all '04+ Siennas, but I'm not positive on that one.
I thought the better shifting was a psychological improvement myself, but if others are saying the same thing, maybe not...
I did a drain and refill on my '07 at 15,000 miles and plan to continue on that schedule. I sure as heck don't trust it for 60,000, let alone the "lifetime" that Toyota specs it. The WS fluid goes for $8-$9 a quart and I put in a few ounces over four quarts in.
2007 Sienna LE FWD 7-pass Pkg #3
1999 Camry LE V6