[brucepick]

I agree - a carefully calibrated MPGuino is extremely accurate.

Look at the notes in my recent fuel log entries. Generally I pump 8-9 gallons, and the Guino generally is accurate within about 0.1 gallon or less. I scroll to the tank data panel, and read the gallons it's recorded for that tank, before I fill.

Your Civic is the generation before mine but if you're up to crimping wires, and I also recommend soldering a couple connections, I can give you installation pointers after you get your 'Guino. I'm pretty sure the wires you need to tap into are in the same place as on my car. You also need to make a case or housing for the 'Guino because it does not come with one, unless that has changed since I got mine.