I'm getting mid-to-high 26's on my daily commute. 27-28 if I go on the highway at all.
30-31 on highway only.
My wife also has an 05 Scion TC. She gets about 1 mpg worse than I do.
Both run on Castrol Syntec 5W-30 and the cheapest gas we can find.
Lookin' forward to getting a LOT better in the smart...