[PaleMelanesian]

Use that vacuum gauge to moderate your acceleration. What units does it read? The Scangauge I have tells me PSI MAP. I aim to accelerate at 12-13 psi, or pretty close to full throttle. (not quite full throttle, or it enriches the mix and wastes fuel) Then when you're at speed, use lots of neutral coasting. Idling the engine at 800 rpm uses much less fuel than cruising it at 2000, and the excess isn't gaining you much of anything. For the next level of mileage, pulse and glide. Even better if you engine-off glide, but only if you're confident and comfortable with that.

I have my upper grille blocked with plexiglass - looks good, smooth aerodynamics, doesn't block too much airflow. In winter I close up most of the lower as well.

Mobil 1 5w20 engine oil, Honda MTF. High tire pressure. Scangauge. Everything else is stock.