2004 Honda Civic CNGFuel Economy & MPG Ratings
Gasoline Compact CarsFront-Wheel Drive
City
26
MPG
Highway
31
MPG
Combined
28
MPG
Real-World MPG
Based on 1 owner report via EPA fueleconomy.gov
37.0MPG average+32.1% vs EPA label
EPA combined: 28 MPG · Owner reported avg: 37.0 MPG
Driving mix: City 10% / Highway 90%
Source: EPA fueleconomy.gov “Your MPG” owner submissions. Real-world results vary by driver behavior, conditions, and equipment.
Owner reported MPG for this vehicle averages 37.0 real world MPG based on 1 owner report. EPA combined rating is 28 MPG.
Trim Comparison
Automatic (variable gear ratios)
CNG CNG
City
26
Hwy
31
Comb
28
Fuel cost: $1,600/yr
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic (variable gear ratios) | CNG CNG | 26 | 31 | 28 | $1,600 |
Annual Fuel Cost
$1,600
Based on gasoline at $3.67/gal, 15,000 miles/year
5-Year Fuel Savings
$4,000
vs. average new vehicle
EPA Fuel Economy Score: -1/10
GHG Score: -1/10
Environment
- CO₂ Tailpipe Emissions
- 251 g/mile
- Annual Petroleum Consumption
- 0.1 barrels
Specifications
- Engine
- 1.7L 4-cyl
- Transmission
- Automatic
- Drivetrain
- FWD
- Body Style
- Sedan
- GVWR
- Class 1 (≤6,000 lbs)
Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.
Engine & Efficiency Details
Source: EPA fueleconomy.gov
- Engine Size
- 1.7L, 4-cylinder
- Induction Type
- 200
- Fuel Type
- Natural Gas
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
National AvgEPA default
$4.490/gal$2,405/yr
California
$5.957/gal$3,191/yr
Texas
$3.888/gal$2,083/yr
Florida
$4.136/gal$2,216/yr
New York
$4.522/gal$2,423/yr
Ohio
$4.510/gal$2,416/yr
Washington
$5.591/gal$2,995/yr
Colorado
$4.618/gal$2,474/yr
Minnesota
$4.344/gal$2,327/yr
Massachusetts
$4.448/gal$2,383/yr
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $2,405/yr | — |
| California | $5.957/gal | $3,191/yrHIGHEST | +$786 |
| Texas | $3.888/gal | $2,083/yrLOWEST | $-322 |
| Florida | $4.136/gal | $2,216/yr | $-189 |
| New York | $4.522/gal | $2,423/yr | +$18 |
| Ohio | $4.510/gal | $2,416/yr | +$11 |
| Washington | $5.591/gal | $2,995/yr | +$590 |
| Colorado | $4.618/gal | $2,474/yr | +$69 |
| Minnesota | $4.344/gal | $2,327/yr | $-78 |
| Massachusetts | $4.448/gal | $2,383/yr | $-22 |
Calculated at 15,000 miles/year (EPA standard assumption) using 28 MPG combined. Regular gasoline prices. Actual costs vary.
Related
Honda Civic CNG MPG History
See how this model's fuel economy changed by year