[PaleMelanesian]

Good advice already listed. I tend to follow Daox's method of pulse-up glide-down, but that really requires a gauge.

Your mileage really starts to go down the drain when you exceed 55 mph. The EPA highway test is 55 mph, so Honda (and others) build their cars to do well at that speed. You'll do better at a steady 55 than anything you can do at 70.

Re: Scangauge. I had a best tank of 42 before I got mine. My first 'gauged tank was 46 mpg, and I haven't been below that level since. I calculate that mine paid for itself in about 4 months.

When I do highway trips (pretty rare), I generally target a 45-60 mph range, or 50-65 if I'm in a hurry. Done right, that can give me 65 mpg (or 60 at the higher speeds). Steady 65 is worth about 43 mpg in my car.