2018 Chevrolet Sonic Gas Tank Size & Fuel Capacity
Fuel tank capacity
12.2gal · 46 L
The 2018 Chevrolet Sonic has a fuel tank capacity of 12.2 gallons (46 liters) on every trim.
A full tank is good for roughly 415–451 highway miles or 305–342 miles around town, going by the EPA ratings.
12.2 gal · Smaller than 92% of 2018 models we list.
- By trim
- Gas cap & parts
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- Miles per tank
- Fill-up cost
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- Compared
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- FAQ
2018 Chevrolet Sonic fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Engine
- no difference
All 11 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| LS 4dr Sedan 1.8L 4cyl 5M · FWD MPG 26 / 35Range 317 / 427 mi | 1.8L 4cyl 5M | FWD | 12.2 gal46 L | 26 / 35 | 317 / 427 mi | |
| LS 4dr Sedan 1.8L 4cyl 6A · FWD MPG 25 / 34Range 305 / 415 mi | 1.8L 4cyl 6A | FWD | 12.2 gal46 L | 25 / 34 | 305 / 415 mi | |
| LT 4dr Hatchback 1.8L 4cyl 5M · FWD MPG 26 / 35Range 317 / 427 mi | 1.8L 4cyl 5M | FWD | 12.2 gal46 L | 26 / 35 | 317 / 427 mi | |
| LT 4dr Hatchback 1.8L 4cyl 6A · FWD MPG 25 / 34Range 305 / 415 mi | 1.8L 4cyl 6A | FWD | 12.2 gal46 L | 25 / 34 | 305 / 415 mi | |
| LT 4dr Sedan 1.4L Turbo 4cyl 6M · FWD MPG 28 / 37Range 342 / 451 mi | 1.4L Turbo 4cyl 6M | FWD | 12.2 gal46 L | 28 / 37 | 342 / 451 mi | |
| LT 4dr Sedan 1.8L 4cyl 6A · FWD MPG 25 / 34Range 305 / 415 mi | 1.8L 4cyl 6A | FWD | 12.2 gal46 L | 25 / 34 | 305 / 415 mi | |
| LT Fleet 4dr Hatchback 1.8L 4cyl 6A · FWD MPG 25 / 34Range 305 / 415 mi | 1.8L 4cyl 6A | FWD | 12.2 gal46 L | 25 / 34 | 305 / 415 mi | |
| Premier 4dr Hatchback 1.4L 4cyl Turbo 6A · FWD MPG 27 / 35Range 329 / 427 mi | 1.4L 4cyl Turbo 6A | FWD | 12.2 gal46 L | 27 / 35 | 329 / 427 mi | |
| Premier 4dr Hatchback 1.4L 4cyl Turbo 6M · FWD MPG 28 / 37Range 342 / 451 mi | 1.4L 4cyl Turbo 6M | FWD | 12.2 gal46 L | 28 / 37 | 342 / 451 mi | |
| Premier 4dr Sedan 1.4L 4cyl Turbo 6A · FWD MPG 27 / 35Range 329 / 427 mi | 1.4L 4cyl Turbo 6A | FWD | 12.2 gal46 L | 27 / 35 | 329 / 427 mi | |
| Premier 4dr Sedan 1.4L 4cyl Turbo 6M · FWD MPG 28 / 37Range 342 / 451 mi | 1.4L 4cyl Turbo 6M | FWD | 12.2 gal46 L | 28 / 37 | 342 / 451 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 2018 Chevrolet Sonic 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 28 MPG, a full 12.2-gallon tank covers about 342 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 12.2 | 415 | 305 |
| 3/4 | 9.1 | 311 | 229 |
| 1/2 | 6.1 | 207 | 153 |
| 1/4 | 3.1 | 104 | 76 |
| 1/8 | 1.5 | 52 | 38 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 536 gallons, roughly 44 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
- 28–32 MPG
- Tailpipe CO2
- 280–311 g/mi
- EPA greenhouse score
- 6–7 of 10
- Source
- EPA ratings
What it costs to fill up a 2018 Chevrolet Sonic
$52.09 to fill the 12.2-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 |
|---|---|---|---|---|
| 12.2 gal | Regular | $4.27 | $52.09 | $39.07 |
By region, 12.2-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $49.04 |
| Midwest | $4.27 | $52.09 |
| Gulf CoastLowest | $3.70 | $45.14 |
| Rocky Mountain | $4.46 | $54.41 |
| West Coast | $5.42 | $66.12 |
| CaliforniaHighest | $5.89 | $71.86 |
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
- 12.2-gallon tank$52.09
- A year of driving (15,000 mi)$2,287
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
Sonic tank size in other years
The 2018 Sonic uses the same 12.2 gal tank as the 2017 model.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2020 Sonic | 12.2 gal | 415 mi |
| 2019 Sonic | 12.2 gal | 451 mi |
| 2018 Sonic | 12.2 gal | 451 mi |
| 2017 Sonic | 12.2 gal | 464 mi |
| 2016 Sonic | 10.8–12.2 gal | 451 mi |
| 2015 Sonic | 12.2 gal | 488 mi |
| 2014 Sonic | 12.2 gal | 427 mi |
| 2013 Sonic | 12.2 gal | 427 mi |
2018 Chevrolet Sonic vs similar 2018 sedans
The Sonic has the smallest tank of the five 2018 sedans compared here: 12.2 gallons, against 14.0 for the Hyundai Elantra.
| 2018 model | Tank | Longest highway range |
|---|---|---|
| Hyundai Elantra | 14.0 gal | 560 mi |
| Nissan Sentra | 13.2 gal | 488 mi |
| Honda Civic | 12.4 gal | 521 mi |
| Ford Focus | 12.4 gal | 496 mi |
| Chevrolet Sonic | 12.2 gal | 451 mi |
Other 2018 sedans of a similar size, one model per brand.
2018 Chevrolet Sonic fuel system recalls
None of the 1 recall NHTSA lists for the 2018 Chevrolet Sonic involve the fuel system.
Frequently asked questions
What is the fuel tank capacity of the 2018 Chevrolet Sonic?
The 2018 Chevrolet Sonic holds 12.2 gallons (46 liters) on every trim we list.
How many gallons and liters does the 2018 Chevrolet Sonic gas tank hold?
The 2018 Chevrolet Sonic tank holds 46 liters, or 12.2 gallons in US gallons.
How far can a 2018 Chevrolet Sonic go on a full tank?
About 415–451 miles on the highway and 305–342 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 2018 Chevrolet Sonic go on a quarter tank?
About 104 highway miles or 76 in town from the 12.2-gallon tank, which has roughly 3.1 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2018 Chevrolet Sonic take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2018 Chevrolet Sonic?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 12.2-gallon tank from empty costs $52.09. It ranges from $45.14 in the Gulf Coast to $71.86 in California.
How much does a full tank of gas weigh in a 2018 Chevrolet Sonic?
About 76 pounds for the 12.2-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 Chevrolet Sonic have a bigger gas tank than the Honda Civic?
No. The 2018 Honda Civic holds up to 12.4 gallons; the 2018 Chevrolet Sonic holds up to 12.2.
Has the 2018 Chevrolet Sonic had a fuel pump or fuel system recall?
No. None of the 1 recall NHTSA lists for the 2018 Chevrolet Sonic 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 (Chevrolet 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.