2018 Kia Optima S — 2.4L 4-cyl, S6 automatic, FWD
This 2018 Kia Optima S (2.4L 4-cyl, S6 automatic, FWD) takes regular (87-octane) gasoline. REGULAR
26
MPG combined (23 city / 32 hwy)
$2,192
est. fuel cost / year (today’s prices, 15k mi)
340 g/mi
tailpipe CO₂
At today's AAA national average price ($3.80/gal, 2026-07-05) — the EPA's own price/date assumption isn't exposed in the public dataset, so we recompute this from the EPA's MPG figure and a sourced current price.
EPA fuel type: Regular · class: Large Cars · engine: 2.4L 4-cyl · transmission: S6 automatic · drive: FWD · MPG retrieved 2026-07-24.