2019 Kia Optima Gas Tank Size & Fuel Capacity
Fuel tank capacity
18.5gal · 70 L
The 2019 Kia Optima has a fuel tank capacity of 18.5 gallons (70 liters) on every trim.
A full tank is good for roughly 555–685 highway miles or 389–500 miles around town, going by the EPA ratings.
18.5 gal · Bigger than 54% of 2019 models we list.
Listed separately: 2019 Kia Optima Hybrid (15.9 gal), 2019 Kia Optima Plug-In Hybrid (14.5 gal).
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- Pump & gauge parts
- FAQ
2019 Kia Optima fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Engine
- no difference
All 4 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| EX 4dr Sedan 1.6L 4cyl Turbo 7AM · FWD MPG 27 / 37Range 500 / 685 mi | 1.6L 4cyl Turbo 7AM | FWD | 18.5 gal70 L | 27 / 37 | 500 / 685 mi | |
| LX 4dr Sedan 2.4L 4cyl 6A · FWD MPG 24 / 33Range 444 / 611 mi | 2.4L 4cyl 6A | FWD | 18.5 gal70 L | 24 / 33 | 444 / 611 mi | |
| S 4dr Sedan 2.4L 4cyl 6A · FWD MPG 24 / 33Range 444 / 611 mi | 2.4L 4cyl 6A | FWD | 18.5 gal70 L | 24 / 33 | 444 / 611 mi | |
| SX 4dr Sedan 2.0L 4cyl Turbo 6A · FWD MPG 21 / 30Range 389 / 555 mi | 2.0L 4cyl Turbo 6A | FWD | 18.5 gal70 L | 21 / 30 | 389 / 555 mi | |
| No trim matches all of these filters. | ||||||
Tank figures are the manufacturer's rated capacity, sorted smallest tank first. Range is tank size times EPA city or highway MPG.
How far a 2019 Kia Optima goes on a tank
Gallons left and the distance they cover at each mark on the fuel gauge, at EPA city and highway mileage. At the combined rating of 27 MPG, a full 18.5-gallon tank covers about 500 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 18.5 | 611 | 444 |
| 3/4 | 13.9 | 458 | 333 |
| 1/2 | 9.3 | 305 | 222 |
| 1/4 | 4.6 | 153 | 111 |
| 1/8 | 2.3 | 76 | 56 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 556 gallons, roughly 30 full tanks.
Fuel gauges aren't perfectly linear and the low-fuel light comes on with a few gallons still in the tank, so plan your stop before the last eighth.
- EPA combined
- 24–31 MPG
- Tailpipe CO2
- 292–371 g/mi
- EPA greenhouse score
- 5–7 of 10
- Source
- EPA ratings
What it costs to fill up a 2019 Kia Optima
$78.99 to fill the 18.5-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 18.5 gal | Regular | $4.27 | $78.99 | $59.25 |
By region, 18.5-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $74.37 |
| Midwest | $4.27 | $78.99 |
| Gulf CoastLowest | $3.70 | $68.45 |
| Rocky Mountain | $4.46 | $82.51 |
| West Coast | $5.42 | $100.27 |
| CaliforniaHighest | $5.89 | $108.96 |
Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.
Your own price
- 18.5-gallon tank$78.99
- A year of driving (15,000 mi)$2,372
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
Optima tank size in other years
The 2019 Optima uses the same 18.5 gal tank as every Optima since 2015.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2020 Optima | 18.5 gal | 685 mi |
| 2019 Optima | 18.5 gal | 685 mi |
| 2018 Optima | 18.5 gal | 685 mi |
| 2017 Optima | 18.5 gal | 685 mi |
| 2016 Optima | 18.5 gal | 722 mi |
| 2015 Optima | 18.5 gal | 629 mi |
| 2014 Optima | 17.2–18.5 gal | 688 mi |
2019 Kia Optima vs similar 2019 sedans
The Optima has the largest tank of the seven 2019 sedans compared here, 18.5 gallons against 18.5 for the Volkswagen Passat.
| 2019 model | Tank | Longest highway range |
|---|---|---|
| Kia Optima | 18.5 gal | 685 mi |
| Volkswagen Passat | 18.5 gal | 666 mi |
| Hyundai Sonata | 18.5 gal | 685 mi |
| Ford Fusion | 16.5–18.0 gal | 561 mi |
| Nissan Altima | 16.0–16.2 gal | 632 mi |
| Toyota Camry | 14.5–16.0 gal | 624 mi |
| Honda Accord | 14.8 gal | 562 mi |
Other 2019 sedans of a similar size, one model per brand.
2019 Kia Optima fuel system recalls
None of the 1 recall NHTSA lists for the 2019 Kia Optima involve the fuel system.
2019 Kia Optima fuel pump and gauge parts
NHTSA lists no fuel-system recall for the 2019 Kia Optima, so a failed pump or gauge is a normal repair. These are the part numbers the makers list for it.
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Frequently asked questions
What is the fuel tank capacity of the 2019 Kia Optima?
The 2019 Kia Optima holds 18.5 gallons (70 liters) on every trim we list.
How many gallons and liters does the 2019 Kia Optima gas tank hold?
The 2019 Kia Optima tank holds 70 liters, or 18.5 gallons in US gallons.
How far can a 2019 Kia Optima go on a full tank?
About 555–685 miles on the highway and 389–500 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.
How many miles can a 2019 Kia Optima go on a quarter tank?
About 153 highway miles or 111 in town from the 18.5-gallon tank, which has roughly 4.6 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2019 Kia Optima take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2019 Kia Optima?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 18.5-gallon tank from empty costs $78.99. It ranges from $68.45 in the Gulf Coast to $108.96 in California.
How much does a full tank of gas weigh in a 2019 Kia Optima?
About 115 pounds for the 18.5-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2019 Kia Optima have a bigger gas tank than the Volkswagen Passat?
No, they match: both top out at 18.5 gallons in 2019.
Has the 2019 Kia Optima had a fuel pump or fuel system recall?
No. None of the 1 recall NHTSA lists for the 2019 Kia Optima involve the fuel system.
Sources
- Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
- MPG and range: EPA ratings (fueleconomy.gov). Range is tank size times EPA MPG.
- Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).
- Recalls: NHTSA recall database (Kia fuel system recalls).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.