2018 Toyota Avalon Hybrid Gas Tank Size & Fuel Capacity
Fuel tank capacity
17.0gal · 64 L
The 2018 Toyota Avalon Hybrid has a fuel tank capacity of 17.0 gallons (64 liters) on every trim.
A full tank is good for roughly 663 highway miles or 680 miles around town, going by the EPA ratings.
17.0 gal · Smaller than 57% of 2018 models we list.
Listed separately: 2018 Toyota Avalon (17.0 gal).
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- FAQ
2018 Toyota Avalon Hybrid fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| Limited 4dr Sedan 2.5L 4cyl CVT · FWD Hybrid MPG 40 / 39Range 680 / 663 mi | 2.5L 4cyl CVT Hybrid | FWD | 17.0 gal64 L | 40 / 39 | 680 / 663 mi | |
| XLE Plus 4dr Sedan 2.5L 4cyl CVT · FWD Hybrid MPG 40 / 39Range 680 / 663 mi | 2.5L 4cyl CVT Hybrid | FWD | 17.0 gal64 L | 40 / 39 | 680 / 663 mi | |
| XLE Premium 4dr Sedan 2.5L 4cyl CVT · FWD Hybrid MPG 40 / 39Range 680 / 663 mi | 2.5L 4cyl CVT Hybrid | FWD | 17.0 gal64 L | 40 / 39 | 680 / 663 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 Toyota Avalon Hybrid 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 40 MPG, a full 17.0-gallon tank covers about 680 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 17.0 | 663 | 680 |
| 3/4 | 12.8 | 497 | 510 |
| 1/2 | 8.5 | 332 | 340 |
| 1/4 | 4.3 | 166 | 170 |
| 1/8 | 2.1 | 83 | 85 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 375 gallons, roughly 22 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
- 40 MPG
- Tailpipe CO2
- 223 g/mi
- EPA greenhouse score
- 9 of 10
- Source
- EPA ratings
What it costs to fill up a 2018 Toyota Avalon Hybrid
$72.59 to fill the 17.0-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 |
|---|---|---|---|---|
| 17.0 gal | Regular | $4.27 | $72.59 | $54.44 |
By region, 17.0-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $68.34 |
| Midwest | $4.27 | $72.59 |
| Gulf CoastLowest | $3.70 | $62.90 |
| Rocky Mountain | $4.46 | $75.82 |
| West Coast | $5.42 | $92.14 |
| CaliforniaHighest | $5.89 | $100.13 |
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
- 17.0-gallon tank$72.59
- A year of driving (15,000 mi)$1,601
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
Avalon Hybrid tank size in other years
The 2018 Avalon Hybrid uses the same 17.0 gal tank as every Avalon Hybrid since 2013.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2022 Avalon Hybrid | 13.2 gal | 581 mi |
| 2021 Avalon Hybrid | 13.2 gal | 581 mi |
| 2020 Avalon Hybrid | 13.2 gal | 581 mi |
| 2019 Avalon Hybrid | 13.2 gal | 581 mi |
| 2018 Avalon Hybrid | 17.0 gal | 663 mi |
| 2017 Avalon Hybrid | 17.0 gal | 663 mi |
| 2016 Avalon Hybrid | 17.0 gal | 663 mi |
| 2015 Avalon Hybrid | 17.0 gal | 663 mi |
| 2014 Avalon Hybrid | 17.0 gal | 663 mi |
| 2013 Avalon Hybrid | 17.0 gal | 663 mi |
2018 Toyota Avalon Hybrid vs similar 2018 sedans
At 17.0 gallons, the Avalon Hybrid's largest tank ranks second of the seven 2018 sedans compared here. The Volkswagen Passat carries the most (18.5 gal) and the Ford Fusion Hybrid the least (14.0 gal).
| 2018 model | Tank | Longest highway range |
|---|---|---|
| Volkswagen Passat | 18.5 gal | 666 mi |
| Toyota Avalon Hybrid | 17.0 gal | 663 mi |
| Mazda 6 | 16.4 gal | 574 mi |
| Buick LaCrosse | 15.8–16.2 gal | 553 mi |
| Hyundai Sonata Hybrid | 15.9 gal | 731 mi |
| Kia Optima Hybrid | 15.9 gal | 731 mi |
| Ford Fusion Hybrid | 14.0 gal | 574 mi |
Other 2018 sedans of a similar size, one model per brand.
2018 Toyota Avalon Hybrid fuel system recalls
None of the 1 recall NHTSA lists for the 2018 Toyota Avalon Hybrid involve the fuel system.
Frequently asked questions
What is the fuel tank capacity of the 2018 Toyota Avalon Hybrid?
The 2018 Toyota Avalon Hybrid holds 17.0 gallons (64 liters) on every trim we list.
How many gallons and liters does the 2018 Toyota Avalon Hybrid gas tank hold?
The 2018 Toyota Avalon Hybrid tank holds 64 liters, or 17.0 gallons in US gallons.
How far can a 2018 Toyota Avalon Hybrid go on a full tank?
About 663 miles on the highway and 680 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 Toyota Avalon Hybrid go on a quarter tank?
About 166 highway miles or 170 in town from the 17.0-gallon tank, which has roughly 4.3 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2018 Toyota Avalon Hybrid take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2018 Toyota Avalon Hybrid?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 17.0-gallon tank from empty costs $72.59. It ranges from $62.90 in the Gulf Coast to $100.13 in California.
How much does a full tank of gas weigh in a 2018 Toyota Avalon Hybrid?
About 105 pounds for the 17.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 Toyota Avalon Hybrid have a bigger gas tank than the Buick LaCrosse?
Yes. The 2018 Toyota Avalon Hybrid holds up to 17.0 gallons; the 2018 Buick LaCrosse holds up to 16.2.
Has the 2018 Toyota Avalon Hybrid had a fuel pump or fuel system recall?
No. None of the 1 recall NHTSA lists for the 2018 Toyota Avalon Hybrid 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 (Toyota 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.