'08 12R
Was averaging around 35mpg with a mix of city/highway, but did a decent amount of idling in traffic.
Ran some seafoam through the fuel/oil, got a bit more aggressive, now I'm getting around 40-45mpg.
Also I'm around 3k miles now, got my right side scoop on, and a breather reroute, noticed it runs a good deal cooler too. Probably helped some.