For the record, here is the average of what I paid for regular gas in each state. Not all 16 states appear since I did not have to fill up in some of them. Oddly, the octane ratings in a couple of states - I don't remember which ones - were lower than the rest; instead of the usual 87/89/93, they were 86/88/91. But the car didn't seem to mind. I got most of the gas at Shell or Chevron but Conoco and even Circle-K were in the mix. IN - $2.25 WI - $2.50 IL - $2.55 MO - $2.17 OK - $2.30 TX - $2.62 NM - $2.85 AZ - $2.91 CA - $3.75 LA - $2.30 AL - $2.36 So, to answer the inevitable question: did I get my kicks on Route 66? Absolutely! And I've already found enough other things to do along the way to merit another trip sometime in the future. Hopefully the nostalgia movement will get more of the shuttered businesses along the Route to reopen. And there's no reason why, given enough time, the same can't be done on other older highways. Take US-41, which is the "old road" through my hometown of Marietta, GA. During this trip, I actually found myself on sections of US-41 in Kentucky, Indiana, Illinois and Wisconsin! So maybe next time I go to Chicago, I take 41 all the way. Why not?