2018 GMC Terrain FWD (1.6L 4-cyl) MPG & Specs
Quick answer
The 2018 GMC Terrain FWD gets an EPA-estimated 28/39 MPG (city/highway) and 32 MPG combined, with an estimated $2,500/year fuel cost and 319 g/mi CO₂. Engine: 1.6 L 4-cyl.
The 2018 GMC Terrain FWD with the 1.6-liter 4-cylinder diesel engine returns an EPA-estimated 28 MPG in the city and 39 MPG on the highway, for a combined 32 MPG. This page summarizes the official EPA fuel-economy and emissions data for this configuration.
| Engine | 1.6 L 4-cyl |
| Transmission | Automatic 6-spd |
| Drive | Front-Wheel Drive |
| Fuel type | Diesel |
| Vehicle class | Small Sport Utility Vehicle 2WD |
| MPG — city | 28 |
| MPG — highway | 39 |
| MPG — combined | 32 |
| Annual fuel cost* | $2,500 |
| CO₂ tailpipe | 319 g/mi |
| EPA GHG score | 6/10 |
How efficient is it?
With a combined 32 MPG, the 2018 GMC Terrain FWD sits in the good range for fuel economy. That is about average for its class (Small Sport Utility Vehicle 2WD, 35 MPG average).
Fuel economy and running costs
At about $2,500 per year in fuel (EPA estimate, 15,000 mi/yr), fuel is a major part of the cost of owning the 2018 GMC Terrain FWD. Over five years that is roughly $12,500 at today's prices — before insurance, maintenance, and depreciation.
Emissions
The 2018 GMC Terrain FWD emits approximately 319 grams of CO₂ per mile at the tailpipe, earning an EPA greenhouse-gas score of 6 out of 10. Lower emissions generally track higher fuel economy.
How to read these numbers
EPA figures come from standardized laboratory test cycles and are the same estimates shown on the vehicle's window sticker. Your real-world mileage depends on driving style, conditions, fuel grade, and maintenance. Use combined MPG and annual fuel cost to compare vehicles fairly.