Not sure anything has beaten the slowest speed possible in the highest gear possible with as few stop/starts as possible? with as much coasting to a stop, when possible?
of course, hypermiling just annoys people on busy roads, let's just acknowledge that. As does wide speed differentials. I have to wonder, if driving when others aren't wouldn't help, then you can drive however you want, possibly without sitting in traffic.
I just fill up whenever the tank gets below an eighth, or when the light comes on, or when the needle drops below E. Not going to change now just because gas prices change... I mean, I'd like to fill up at the lowest cost possible, but still.