Proman,
If you're still around. I know it's been a while, but you'd asked if I would give you an update on the 2009 Sienna we bought. So... For oil, so far, so good. I have not noticed any engine problems at this point and we're at almost 60K miles. Yes, the oil changes have to be made at that particular dealership.
Here's what I've found about this whold deal though. The oil changes are free, but I think it's their trick to get people in as most customers will agree to the other items that they throw on the list to do. I fell for one of the items once and then decided to do some research. Everything was good the first couple of times I took it in - no charges, etc. They even washed the car for me and all. But then they started trying to add things that were not necessary - even items that were not on the regular schedule of things to do. One thing they charged me for once was changing the cabin filter. They charged like over $90.00 for that. I didn't even know what a cabin filter was at the time. After that first charge, I got on the net and checked it out. Found that I could buy the part myself and install it behind the glove box in like 1 minute. They had charged a full hour.
Anyway, the report is that the oil changes are all good, but you should only ask for the oil change and that's it. Man, what a racket delearships have going.
I'd like to hear if there are any other stories going on with this though.