2018 Kia Optima S

2.4L 4-cyl · 6-speed automatic with select shift · FWD

GasolineRegularLarge Cars

Official EPA record #39822 from FuelEconomy.gov · data 2026-07-26 · every assumption below is yours to edit. How this is computed

Per month

$151.90

Per year

$1,823

Per mile

15.2¢/mi

5-year total

$9,115

sedan body style — not this exact model

Notes & official EPA estimate

455.7 gal of fuel / yeargasoline @ $4.00/galAt $5.00/gal: $189.88/mo

A mile road trip costs about $45.60 in energy.

Official FuelEconomy.gov estimate: $2,400/year — assumes 15,000 miles/year and EPA price assumptions. The figures above use your inputs instead.

Compare with another vehiclePrices: EPA national averages, Jul 24, 2026 — override anytime.

At 12,000 miles per year (55% city / 45% highway) with EPA national-average prices ($4.00/gal regular), this 2018 Kia Optima S costs about $151.90 per month in fuel — $1,823 per year, 15.2¢/mi, $9,115 over five years.Assumptions are editable below. Prices as of July 24, 2026 · EPA vehicle record #39822. EPA figures are laboratory estimates; real-world cost varies with driving conditions, weather, and where you buy energy.

Official EPA efficiency

Measure	Value
City MPG	23
Highway MPG	32
Combined MPG	26

Official EPA estimates

Estimate	Value
Official annual fuel cost (15,000 mi/yr)	$2,400/yr
Tailpipe CO₂	340 g/mi
EPA greenhouse gas score	5/10
EPA smog rating (Federal Tier 3 Bin 30)	7/10

Source: U.S. EPA / DOE FuelEconomy.gov, vehicle record #39822 (record updated 2018-02-06). Snapshot processed 2026-07-26; page data last changed 2018-02-06.

View this record on FuelEconomy.gov

Related configurations

Same year, same family

Adjacent model years