2026 · Large Car · Gas
2026 Kia K5 MPG & fuel economy
The 2026 Kia K5 is a large car offered in 4 EPA-rated configurations. The most efficient version returns 30 MPG combined (26 city / 37 highway) on regular gasoline. Across the lineup, combined ratings range from 27 to 30 MPG. Efficiency is unchanged from the 2025 model. Among 24 large cars rated for 2026, it ranks 10th for lowest fuel cost. At 15,000 miles a year with $3.10/gal regular gas, it costs about $1,550 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2026 Kia K5's fuel average is 12.8 km/L (7.8 L/100 km), or 30 MPG combined: 11.1 km/L in the city and 15.7 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 26 | 11.1 | 9.0 |
| Highway | 37 | 15.7 | 6.4 |
| Combined | 30 | 12.8 | 7.8 |
How it ranks among 2026 Large Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
K5 MPG across model years
Full history →4 EPA-rated configurations
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| FWD · 2.5L 4-cyl · 8-speed automatic K5 w/Stop-Start |
Gas | 26 MPG | 37 MPG | 30 MPG | — | $1,550 |
| FWD · 2.5L 4-cyl · 8-speed automatic K5 |
Gas | 25 MPG | 36 MPG | 29 MPG | — | $1,603 |
| AWD · 2.5L 4-cyl · 8-speed automatic K5 AWD |
Gas | 24 MPG | 33 MPG | 27 MPG | — | $1,722 |
| FWD · 2.5L 4-cyl turbo · 8-speed dual-clutch K5 |
Gas | 23 MPG | 33 MPG | 27 MPG | — | $1,722 |
Specs (most efficient configuration)
- Fuel
- Regular gasoline
- Engine / motor
- 2.5L 4-cyl
- Transmission
- 8-speed automatic
- Drivetrain
- FWD
- Passenger volume
- 105 cu ft
- Cargo volume
- 16 cu ft
- Tailpipe CO₂
- 298 g/mi
- EPA fuel economy score
- 6/10
- EPA greenhouse gas score
- 6/10
2026 Kia K5 vs. rivals
Compare the 2026 K5
With any other car from any year, including other K5 model years. Type a year to jump, e.g. "2015 Accord".
Frequently asked questions
What is the gas mileage of the 2026 Kia K5?
Up to 30 MPG combined (26 city / 37 highway); ratings range from 27 to 30 MPG depending on configuration.
What fuel does the 2026 Kia K5 use?
Regular gasoline.
What is the fuel average in km/L for the 2026 Kia K5?
The 2026 Kia K5's fuel average is 12.8 km/L (7.8 L/100 km), or 30 MPG combined: 11.1 km/L in the city and 15.7 km/L on the highway.
How much does it cost to fuel the 2026 Kia K5 per year?
About $1,550 at 15,000 miles a year with $3.10/gal regular gas, or $10.33 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.