Well, here it is----we just took another trip and one-way got 20MPG, and the other way got 23MPG-----we have no case now! Around town we still average 12-13MPG----I think this is what the vehicle is going to get with nothing anything we can do. We do have friends driving Siennas getting (they swear) 20 MPG, but after careful consideration of the facts(4255 lb.s), I think we have what we have. I do wish that Toyota would have posted more accurate mileage spec.s on the window sticker, and I still believe our odometer/mileage calculations are off because; on our last trip my odometer would read 9.3 miles travelled for every ten mile-markers---if those things are accurate, then my odometer and mileage calculations are off by 7%. The XLE that we bought came with 225-60/17 tires, and the others come with 215-65/16 tires putting the mileage closer to what the mile markers would read.
