You'll be driving right past my hometown of Pontiac, Il. If you have an hour or two, go downtown (look for the courthouse in the center of town) and hit the Route 66 museum and the Oakland/Pontiac car museum. Both have lots of good gas & oil stuff to see. You can walk from one to the other and you can see most everything in 2-3 hours between the two.
Sorry, no Sunoco stuff. if there was, I would have bought it already