[brucepick]

You can coast on downgrades. If it's a 5-speed you can really get an increase from that. You will gradually lose some speed depending on the grade but it's a good technique on the highway as well as small roads.

Grill block: I use bits of foam pipe insulation for grill block. I duct tape several sections together to make the size chunks I need. I putthem in and out of the grill as needed to match the outside temp. A ScanGauge will tell you if you've installed too much grill block, by using the engine coolant temp readout. Or you could wire an indicator bulb that runs off the radiator fan terminals - that's a bit more time consuming. Also not as much info as you get from a real temperature readout.

The '96 Neon should be OBDII. If so, you can install a ScanGauge. It's a very quick installation - plugs into the OBDII connector, usually under the dash somewhere. Will read out mpg as well as other info. Costs about $145-150 or so.