I'll second what California98Civic wrote:
If you want to optimize your mpg, get a manual transmission.
Here's a link to the EPA's page for the '97 Civics.
EPA page for 1997 Civics
The HX w/ automatic is the first one at top of the list; you can recognize it by the continuously variable tranny.
29/31/35 mpg: city/combined/highway.
The HX w/ standard tranny is the first of the manuals listed.
31/34/39 mpg.
Both cars show they have the VTEC-E engine, if you follow the link for the individual car's page and scroll to the bottom where the engine is ID'd.
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Check your tire pressure - keep it up !!
We've learned that diet has a closer relationship to cancer than we ever thought. Please see this Wikipedia article on
The China Study.
Driving Lean Burn '97 Civic HX, lotsa mods by now! '89 Volvo 240 is semi-retired. I did love that car though!