MPG AtlasKia K4 MPG
EPA fuel economy for 8 Kia K4 trims sold from 2025 to 2026. Best ever: 34 MPG (2025 K4). Latest model year 2026: 28 to 33 MPG combined across 5 trims.
Kia K4 fuel cost calculator
Enter what you pay for fuel and how far you drive in a year. The starting prices are the ones the EPA uses for its own yearly fuel-cost estimates. Every cost on this page updates as you type.
At $4.16 a gallon for regular and 15,000 miles a year, the cheapest 2026 Kia K4 to fuel is the K4 4DR w/ DMS, 2.0 L, 4 cyl (33 MPG) at $1,890 a year. The K4 Hatchback, 1.6 L, 4 cyl (28 MPG) costs $2,230, so the thriftier trim saves $340 a year and $1,700 over five years.
| 2026 trim | Engine | Transmission | Drive | Fuel | Comb | Cost/yr | vs cheapest |
|---|---|---|---|---|---|---|---|
| K4 4DR w/ DMS | 2.0 L, 4 cyl | Auto (AV-S1) | FWD | Regular | 33 | $1,890 | cheapest |
| K4 without DMS | 2.0 L, 4 cyl | Auto (AV-S1) | FWD | Regular | 33 | $1,890 | cheapest |
| K4 Hatchback | 2.0 L, 4 cyl | Auto (AV-S1) | FWD | Regular | 30 | $2,080 | +$190 |
| K4 | 1.6 L, 4 cyl | Auto (S8) | FWD | Regular | 28 | $2,230 | +$340 |
| K4 Hatchback | 1.6 L, 4 cyl | Auto (S8) | FWD | Regular | 28 | $2,230 | +$340 |
Cost per year is miles per year divided by the EPA combined rating, times your fuel price; electric vehicles use the EPA's kWh per 100 miles instead. Rounded to the nearest $10. Your prices are kept in this browser only.
Kia K4 MPG by year
| Year | Best combined | City | Hwy | Best trim that year | Trims |
|---|---|---|---|---|---|
| 2026 | 33 | 29 | 39 | K4 4DR w/ DMS, 2.0 L, 4 cyl, Auto (AV-S1) | 5 |
| 2025 | 34 | 30 | 40 | K4, 2.0 L, 4 cyl, Auto (AV-S1) | 3 |
Every Kia K4 trim
| Year | Trim | Engine | Transmission | Drive | Fuel | City | Hwy | Comb | CO2 g/mi | Fuel cost/yr |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | K4 4DR w/ DMS | 2.0 L, 4 cyl | Auto (AV-S1) | FWD | Regular | 29 | 39 | 33 | 269 | $1,890 |
| 2026 | K4 without DMS | 2.0 L, 4 cyl | Auto (AV-S1) | FWD | Regular | 29 | 39 | 33 | 267 | $1,890 |
| 2026 | K4 Hatchback | 2.0 L, 4 cyl | Auto (AV-S1) | FWD | Regular | 28 | 34 | 30 | 289 | $2,080 |
| 2026 | K4 | 1.6 L, 4 cyl | Auto (S8) | FWD | Regular | 26 | 33 | 28 | 314 | $2,230 |
| 2026 | K4 Hatchback | 1.6 L, 4 cyl | Auto (S8) | FWD | Regular | 26 | 33 | 28 | 314 | $2,230 |
| 2025 | K4 | 2.0 L, 4 cyl | Auto (AV-S1) | FWD | Regular | 30 | 40 | 34 | 264 | $1,840 |
| 2025 | K4 | 2.0 L, 4 cyl | Auto (AV-S1) | FWD | Regular | 29 | 39 | 33 | 273 | $1,890 |
| 2025 | K4 | 1.6 L, 4 cyl | Auto (S8) | FWD | Regular | 26 | 36 | 29 | 303 | $2,150 |
CO2 is tailpipe grams per mile from the EPA test. Fuel cost per year uses the prices and miles in the calculator above (the EPA's own prices and 15,000 miles a year until you change them); blank when the fuel has no price here (hydrogen, natural gas).
Compare with other 2026 Midsize Cars
| Vehicle | Combined | City | Hwy |
|---|---|---|---|
| 2026 Tesla Model 3 Standard RWD | 139 | 147 | 130 |
| 2026 Lexus ES 350e (19 inch Wheels) | 127 | 135 | 118 |
| 2026 Genesis Electrified G80 | 96 | 99 | 93 |
| 2026 Mercedes-Benz EQE 320 Plus | 94 | 94 | 94 |
| 2026 Porsche Taycan GTS Sport Turismo | 82 | 84 | 80 |
| 2026 Toyota Prius | 57 | 57 | 56 |
All Midsize Cars ranked by MPG
Questions people ask
What is the best MPG for a Kia K4?
The most efficient Kia K4 the EPA has rated is the 2025 K4 at 34 MPG combined (30 city, 40 highway).
What MPG does the 2026 Kia K4 get?
2026 Kia K4 trims range from 28 to 33 MPG combined, depending on engine, transmission and drivetrain.
Which Kia K4 has the worst fuel economy?
The 2026 K4 is the lowest rated at 28 MPG combined.
How much does it cost to fuel a Kia K4 for a year?
At $4.16 a gallon for regular and 15,000 miles a year, the cheapest 2026 Kia K4 to fuel is the K4 4DR w/ DMS, 2.0 L, 4 cyl (33 MPG) at $1,890 a year. The K4 Hatchback, 1.6 L, 4 cyl (28 MPG) costs $2,230, so the thriftier trim saves $340 a year and $1,700 over five years.
More from Kia: every Kia model. Fuel types on this model: Regular. EPA classes: Large Cars, Midsize Cars.