I hypermiled the last tank. I didn't push start the car and I didn't turn off the engine to coast.
I did push in the clutch and coasted down hills. When I started to lose speed, I re-engaged the clutch.
I slowed down (55-65).
I accelerated slowly and upshifted rapidly.
I anticipated stops and tried to keep rolling as much as possible.
I kept my speed as consistent as possible and tried to use momentum on the uphills...like semis do and never used cruise control.
I usually kept the windows up and rarely used the AC...only when my girlfriend was in the car...she's such a baby...
but, when it got hot, I didn't sit and sweat for the sake of a mpg or two.
I got rid of any excess weight out of the trunk.
I turned off the engine on stoplights I knew took a long time to cycle.
Now, after all that freakin' work, I go to fill up and enjoy the rewards...and the #$%^ autostop freezes and I shoot diesel fuel out of the tank...effectively negating the test.
However, based on the total fuel on the pump, the amount I can squeeze into the tank after the nozzle clicks off the first time (which is where I always stop) and an estimate of how much shot out of the tank, I can pretty confidently state that my mileage should have been around 53 to 55 mpg (and that's conservative)...versus a normal 44-45. I was on a quarter tank at 568 miles and I'm usually way below a quarter tank at those miles.
My best prior tank was 49+ driving continuously at 65-70 with the AC on.
The point is that you can practice a few hypermile techniques and get great results without going to the extreme and the biggest gain is just slowing down. If you only do that, you'll get great results.
The things I did weren't any real extra effort and yielded me some nice gains. I'll keep hypermiling and the next time, I'll go to my normal pump...which has never malfunctioned...and get better stats.