2018 Honda Civic Si 4DrFuel Economy & MPG Ratings
Gasoline Midsize CarsFront-Wheel Drive
City
28
MPG
Highway
38
MPG
Combined
32
MPG
Trim Comparison
Manual 6-spd
Premium
City
28
Hwy
38
Comb
32
Fuel cost: $2,550/yr
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Manual 6-spd | Premium | 28 | 38 | 32 | $2,550 |
Annual Fuel Cost
$2,550
Based on gasoline at $3.67/gal, 15,000 miles/year
5-Year Fuel Savings
$-750
vs. average new vehicle
EPA Fuel Economy Score: 7/10
GHG Score: 7/10
Environment
- CO₂ Tailpipe Emissions
- 279 g/mile
- Annual Petroleum Consumption
- 9.3 barrels
Specifications
- Engine
- 1.5L 4-cyl
- Transmission
- 6-speed Manual
- 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
- 1.5L, 4-cylinder
- Induction Type
- Direct Injection
- Fuel Type
- Premium Gasoline
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
National AvgEPA default
$4.490/gal$2,105/yr
California
$5.957/gal$2,792/yr
Texas
$3.888/gal$1,823/yr
Florida
$4.136/gal$1,939/yr
New York
$4.522/gal$2,120/yr
Ohio
$4.510/gal$2,114/yr
Washington
$5.591/gal$2,621/yr
Colorado
$4.618/gal$2,165/yr
Minnesota
$4.344/gal$2,036/yr
Massachusetts
$4.448/gal$2,085/yr
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $2,105/yr | — |
| California | $5.957/gal | $2,792/yrHIGHEST | +$687 |
| Texas | $3.888/gal | $1,823/yrLOWEST | $-282 |
| Florida | $4.136/gal | $1,939/yr | $-166 |
| New York | $4.522/gal | $2,120/yr | +$15 |
| Ohio | $4.510/gal | $2,114/yr | +$9 |
| Washington | $5.591/gal | $2,621/yr | +$516 |
| Colorado | $4.618/gal | $2,165/yr | +$60 |
| Minnesota | $4.344/gal | $2,036/yr | $-69 |
| Massachusetts | $4.448/gal | $2,085/yr | $-20 |
Calculated at 15,000 miles/year (EPA standard assumption) using 32 MPG combined. Regular gasoline prices. Actual costs vary.
Related
Honda Civic Si 4Dr MPG History
See how this model's fuel economy changed by year