My best yet! I filled it to the first click of the pump and was surprised to get well over 300 miles before it hit half a tank. I started to wonder if the gauge was working correctly. I ended up filling it again before it hit empty, I had about 50 miles between gas stations. I can usually put about 10 gallons in, I only got 9.16 before the pump clicked.
I was actually going a bit faster than usual for this tank. It seems like 2000 RPM and 50 MPH is about ideal for this Honda. I've tried slower cruising speeds and never saw anything this high. My previous best of 54 MPG was also around 50 MPH. I'm not sure if the engine is more efficient at that speed, or if it's just longer coast times and more momentum to take me up hills.
I also replaced the radiator about halfway through the tank when it started leaking. I was overheating for only a couple of miles. Even if it ran more efficiently while overheating, it wasn't for very long. And I had the partial grill block out for a while until my new radiator arrived.
I also did one (small) burnout during this tank!
Now I'm wondering if I should be revving the engine higher. I'm usually in 5th gear by 30-32 MPH. Which is something like 1200 RPM. Maybe I should reserve 5th gear for speeds above 40 MPH?