2018 GMC Terrain AWDFuel Economy & MPG Ratings
Diesel Small Sport Utility Vehicle 4WDAll-Wheel Drive
City
28
MPG
Highway
38
MPG
Combined
32
MPG
Real-World MPG
Based on 3 owner reports via EPA fueleconomy.gov
39.1MPG average+22.1% vs EPA label
EPA combined: 32 MPG · Owner reported avg: 39.1 MPG
Range: 37–43 MPG
Driving mix: City 20% / Highway 80%
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 39.1 real world MPG based on 3 owner reports. EPA combined rating is 32 MPG.
Trim Comparison
Automatic 6-spd
Diesel Diesel
City
28
Hwy
38
Comb
32
Fuel cost: $2,650/yr
Automatic 9-spd
Regular
City
24
Hwy
28
Comb
26
Fuel cost: $2,600/yr
Automatic 9-spd
Premium
City
21
Hwy
26
Comb
23
Fuel cost: $3,550/yr
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic 6-spd | Diesel Diesel | 28 | 38 | 32 | $2,650 |
| Automatic 9-spd | Regular | 24 | 28 | 26 | $2,600 |
| Automatic 9-spd | Premium | 21 | 26 | 23 | $3,550 |
Annual Fuel Cost
$2,650
Based on gasoline at $3.67/gal, 15,000 miles/year
5-Year Fuel Savings
$-1,250
vs. average new vehicle
EPA Fuel Economy Score: 7/10
GHG Score: 6/10
Environment
- CO₂ Tailpipe Emissions
- 319 g/mile
- Annual Petroleum Consumption
- 11.2 barrels
Specifications
- Engine
- 2L 4-cyl
- Transmission
- 9-speed Automatic
- Drivetrain
- AWD
- Body Style
- SUV/Crossover
- 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
- 1.6L, 4-cylinder
- Efficiency Tech
- Auto Start-Stop
- Fuel Type
- Diesel
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
GMC Terrain AWD MPG History
See how this model's fuel economy changed by year