Drove from PDX to Northern CA taking the I-5 to 58 to 97 route. Average on the way down was 12.1. On the way back... drum roll please... 14.5.
But I drove like I was Driving Miss Daisy(60-70). No racing(and killing) every one(except those that would obviously kill me) that wanted to pass me. It's amazing some of the scenery and stuff that I've been missing when "racing".