Kia Optima — All Years
| Year | Engine | Fuel | MPG (UK) | NHTSA |
|---|---|---|---|---|
| 2020 | 2L 4-cyl | Regular Gasoline | 32 | 5★ |
| 2019 | 2L 4-cyl | Regular Gasoline | 32 | 5★ |
| 2018 | 2L 4-cyl | Regular Gasoline | 34 | 5★ |
| 2017 | 2L 4-cyl | Regular Gasoline | 34 | 5★ |
| 2016 | 2L 4-cyl | Regular Gasoline | 34 | 5★ |
| 2015 | 2.4L 4-cyl | Regular Gasoline | 31 | 5★ |
| 2014 | 2.4L 4-cyl | Regular Gasoline | 31 | 5★ |
| 2013 | 2.4L 4-cyl | Regular Gasoline | 32 | 5★ |
| 2012 | 2.4L 4-cyl | Regular Gasoline | 32 | 5★ |
| 2011 | 2.4L 4-cyl | Regular Gasoline | 32 | 5★ |
| 2010 | 2.4L 4-cyl | Regular Gasoline | 30 | — |
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