- Newest year: 2018
- Gas
- Large cars
- Same as 2017
2015-2018 Kia K900 MPG & Fuel Cost
4 model years · 18–21 MPG combined
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 5 of 10 large car configurations, MY2018. Ranked against all rated configurations, not sales-weighted.
2015-2018 Kia K900 at a glance
The 2015-2018 Kia K900 covers 4 model years in the EPA database (8 configurations in all), rated 18–21 MPG combined. The newest model year, 2018, costs about $3,270 a year to fuel for its most efficient version, the K900 3.8L 6-cyl RWD (20 MPG), at regular gasoline $4.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2016 and 2017; 2018 repeat the values of the year before. The best combined rating in the generation, 21 MPG, was reached in 2015.
2015-2018 Kia K900 by model year
| Model year | Powertrains | Combined | $/yr | EPA ratings |
|---|---|---|---|---|
| 2018 | Gas | 18–20 MPG | $3,270–$4,570 | Same EPA ratings as 2017 |
| 2017 | Gas | 18–20 MPG | $3,270–$4,570 | Ratings changed |
| 2016 | Gas | 18–20 MPG | $3,270–$3,710 | Ratings changed |
| 2015 | Gas | 18–21 MPG | $3,140–$4,520 | First year |
What the 2018 K900 3.8L 6-cyl RWD costs to drive
Per month
$273
$3,270 a year ÷ 12
Per 25 miles
$5.45
Per 100 miles
$21.80
Five years
$16,350
5 × the yearly cost, prices held at today's level
vs the large car median
$50less a year
Class median $3,320 a year, MY2018
Based on 15,000 miles a year and regular gasoline $4.36/gal (U.S. average, Sep 2026).
2018 Kia K900 MPG
EPA lists the same ratings for the 2018 Kia K900 as for the 2017 model, so the configurations and costs are the ones in the 2017 section above.See 2017
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| K900 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | RWD | 17 | 25 | 20 | $3,270 |
| K900 5.0L 8-cyl | 5.0L 8-cyl | RWD | 15 | 23 | 18 | $4,570 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2017 Kia K900 MPG
18–20 MPG · $3,270–$4,570/yr
Versus 2016: The most efficient configuration stays at 20 MPG. Its annual cost stays at $3,270.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| K900 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | RWD | 17 | 25 | 20 | $3,270 |
| K900 5.0L 8-cyl | 5.0L 8-cyl | RWD | 15 | 23 | 18 | $4,570 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2016 Kia K900 MPG
18–20 MPG · $3,270–$3,710/yr
Versus 2015: The most efficient configuration moves from 21 to 20 MPG, down 1. Its annual cost goes from $3,140 to $3,270, $130 more.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| K900 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | RWD | 17 | 25 | 20 | $3,270 |
| K900 5.0L 8-cyl | 5.0L 8-cyl | RWD | 15 | 22 | 18 | $3,710 |
2015 Kia K900 MPG
18–21 MPG · $3,140–$4,520/yr
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| K900 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | RWD | 18 | 26 | 21 | $3,140 |
| K900 5.0L 8-cyl | 5.0L 8-cyl | RWD | 15 | 23 | 18 | $4,520 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Fuel cost by state
Yearly cost of the K900 3.8L 6-cyl RWD: $4,450 in California and $2,850 in Texas, a $1,600 difference.
- California $4,450
- Washington $4,130
- New York $3,270
- Florida $3,090
- Texas $2,850
Similar cars
Closest combined MPG among MY2018 large car models.
Generations
- 2015-2018 (KH)
- 2019-2020 (RJ)
Frequently asked questions
What gas mileage does the 2015-2018 Kia K900 get?
EPA rates the 2015-2018 Kia K900 at 18–21 MPG combined across 8 configurations and 4 model years. The most efficient version, the 2015 K900 3.8L 6-cyl RWD, is rated 21 MPG (18 city, 26 highway).
Which years had the best MPG in the 2015-2018 Kia K900?
The K900 3.8L 6-cyl RWD reached the generation's best combined rating, 21 MPG, in 2015. The lowest top rating, 20 MPG, was in 2016, 2017 and 2018.
Did EPA ratings change during the 2015-2018 Kia K900?
Yes. Ratings changed in 2016 and 2017. In 2018 the values repeat the year before.
How much does it cost to fuel a 2018 Kia K900 per year?
Driving 15,000 miles a year at regular gasoline $4.36/gal (U.S. average, Sep 2026), the K900 3.8L 6-cyl RWD costs about $3,270 a year. Across all 2 configurations the cost runs $3,270–$4,570 a year. That is a $1,300 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2018 Kia K900 100 miles?
About $21.80 per 100 miles for the K900 3.8L 6-cyl RWD at regular gasoline $4.36/gal (U.S. average, Sep 2026), and between $21.80 and $30.47 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2018 Kia K900 more efficient in the city or on the highway?
The K900 3.8L 6-cyl RWD is rated 17 city and 25 highway MPG, so it is more efficient on the highway, by 8 MPG.
How does the 2018 Kia K900 compare with other large car configurations?
The K900 3.8L 6-cyl RWD costs about $3,270 a year to fuel, $50 less than the class median of $3,320, and less than 5 of 10 large car configurations. The comparison covers all 134 rated large car configurations for MY2018, not weighted by sales.
Is the 2018 Kia K900 different from the 2017 model?
No. EPA lists the same ratings for 2017 and 2018: 2 configurations rated 18–20 MPG combined. See the 2017 Kia K900 for that year.