I'm not Billy, but I will chime in with my experience, FWIW.

I have a six mile, moderately hilly commute to work which includes fourteen traffic signals and two stop signs. The weather here is also pretty moderate, even in winter. I seem to get between 42 and 44 mpg in this environment -- a lot depends on how kind the traffic signals are to me on any particular day.

On the highway I have tended to average around 50 mpg or better.

I don't really employ any specific gas-saving 'tricks', but then my normal driving style is pretty mellow to begin with, and I tend to drive at or slightly above the posted speed limit.