I had a new front tire with a rounder profile installed and found a station selling gasoline without ethanol. I achieved a personal record of 20 more miles on the main tank before hitting reserve. I am stoked about it. I did not ride any differently, just noticed that I had more miles on trip meter. Note that this was not my CB, but still I got 185 miles before reserve and made it to 201.1 before filling up. I had always wanted to see the 200 mile mark. Overall great day, beautiful ride of 330 miles and found some fantastic motorcycle roads that I had never travelled.
The tire for the record is a Shinko 712. It is the same size (100/90-16) as the stock Dunlop, but is noticeably rounder which I suppose gives a lower rolling resistance.