Better mileage going 65 than 60?

[Jonathan_ED3]

This is in a '93 Civic 2dr DX 5spd, all stock...

I've noticed the past few tanks that I'm getting better mileage going 65-70 than I do going 60mph. I've been speeding lately because I seem to always be running late to school or work.

Additionally, as I look over my gas log, most of my tanks where my mileage is on the higher end of the spectrum, I note that I wasn't driving efficiently, I was speeding everywhere and/or generally driving like a maniac, sitting in traffic, go through drive-throughs. Yet when I baby the car, drive no faster than 60mph, don't sit through any drive-throughs, my mileage doesn't seem to increase.

I guess this is exactly why a SuperMID is vital to have. I will definitely have to try to get one at some point.

Has anybody else noticed anything quirky like this? Until my mileage shows otherwise, I'm going to start speeding!