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2018 Toyota Avalon Gas Tank Size & Fuel Capacity

Sedan 5 trims listed 1 fuel-system recall ← 2017 2019 →

Fuel tank capacity

17.0gal · 64 L

The 2018 Toyota Avalon has a fuel tank capacity of 17.0 gallons (64 liters) on every trim.

A full tank is good for roughly 510 highway miles or 357 miles around town, going by the EPA ratings.

17.0 gal · Smaller than 57% of 2018 models we list.

Listed separately: 2018 Toyota Avalon Hybrid (17.0 gal).

Highway range
510 mi
City range
357 mi
Fuel
Regular unleaded
EPA combined
24 MPG
EPA size class
Midsize Cars

2018 Toyota Avalon fuel tank capacity by trim

MPG and range are city / highway.

TrimEngineDrive Tank MPG city / hwy Range city / hwy
Limited 4dr Sedan 3.5L 6cyl 6A · FWD MPG 21 / 30Range 357 / 510 mi 3.5L 6cyl 6A FWD 17.0 gal64 L 21 / 30 357 / 510 mi
Touring 4dr Sedan 3.5L 6cyl 6A · FWD MPG 21 / 30Range 357 / 510 mi 3.5L 6cyl 6A FWD 17.0 gal64 L 21 / 30 357 / 510 mi
XLE 4dr Sedan 3.5L 6cyl 6A · FWD MPG 21 / 30Range 357 / 510 mi 3.5L 6cyl 6A FWD 17.0 gal64 L 21 / 30 357 / 510 mi
XLE Plus 4dr Sedan 3.5L 6cyl 6A · FWD MPG 21 / 30Range 357 / 510 mi 3.5L 6cyl 6A FWD 17.0 gal64 L 21 / 30 357 / 510 mi
XLE Premium 4dr Sedan 3.5L 6cyl 6A · FWD MPG 21 / 30Range 357 / 510 mi 3.5L 6cyl 6A FWD 17.0 gal64 L 21 / 30 357 / 510 mi

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 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 24 MPG, a full 17.0-gallon tank covers about 408 miles.

GaugeGallonsHighway milesCity miles
Full17.0510357
3/412.8383268
1/28.5255179
1/44.312889
1/82.16445

Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 625 gallons, roughly 37 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 MPG
Tailpipe CO2
366 g/mi
EPA greenhouse score
5 of 10
Source
EPA ratings

What it costs to fill up a 2018 Toyota Avalon

$72.59 to fill the 17.0-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.

TankFuelUS avg / galFrom emptyFrom 1/4 tank
17.0 galRegular$4.27$72.59$54.44

By region, 17.0-gallon tank

RegionRegular / galFill 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)$2,669

Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.

Avalon tank size in other years

The 2018 Avalon uses the same 17.0 gal tank as every Avalon since 2013.

Model yearTankLongest highway range
2022 Avalon 14.5–15.8 gal 490 mi
2021 Avalon 14.4–15.8 gal 490 mi
2020 Avalon 14.5–15.8 gal 490 mi
2019 Avalon 14.5–15.8 gal 490 mi
2018 Avalon 17.0 gal 510 mi
2017 Avalon 17.0 gal 510 mi
2016 Avalon 17.0 gal 527 mi
2015 Avalon 17.0 gal 527 mi
2014 Avalon 17.0 gal 527 mi
2013 Avalon 17.0 gal 527 mi
Toyota Avalon fuel tank by model yearSmallest tank Larger tank options
1995199619971998199920002001200220032004200520062007200820092010201120122013201420152016201720182019202020212022
← 2017 Toyota Avalon Every Avalon year 2019 Toyota Avalon →

2018 Toyota Avalon vs similar 2018 sedans

At 17.0 gallons, the Avalon's largest tank ranks third of the seven 2018 sedans compared here. The Volkswagen Passat carries the most (18.5 gal) and the Hyundai Sonata Hybrid the least (15.9 gal).

2018 modelTankLongest highway range
Volkswagen Passat 18.5 gal 666 mi
Ford Fusion 16.5–18.0 gal 528 mi
Toyota Avalon 17.0 gal 510 mi
Mazda 6 16.4 gal 574 mi
Buick LaCrosse 15.8–16.2 gal 553 mi
Kia Optima Hybrid 15.9 gal 731 mi
Hyundai Sonata Hybrid 15.9 gal 731 mi

Other 2018 sedans of a similar size, one model per brand.

2018 Toyota Avalon fuel system recalls

NHTSA lists 1 fuel-system recall for the 2018 Toyota Avalon, out of 2 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.

Delivery · Fuel pumpJan 13, 2020 · NHTSA 20V012000 · Toyota Motor Engineering & Manufacturing · 1,830,752 vehicles

Toyota Motor Engineering & Manufacturing (Toyota) recalled certain 2018-2019 4Runner, Highlander, Camry, Land Cruiser, Sequoia, Sienna, Tacoma and Tundra, and Lexus RC 300, RC 350, GS 350, GX 460, IS 300, LC 500, LS 500, LX 570, RX 350L, and 2019 Toyota Avalon and Corolla, and certain Lexus NX 300, and ES 350 vehicles on January 13, 2020. On March 4, 2020, Toyota expanded the recall to include certain 2014-2015 Toyota 4Runner and Land Cruiser, 2018 Avalon, Corolla, 2014 FJ Cruiser, 2017 Sienna and Lexus 2018 ES 350, 2018-2019 GS 300, 2013-2014 GS350, 2014-2015 GX 460, IS 350 and LX 570, 2014 IS F, 2018-2019 IS 350, LC 500H and LS 500H, 2013-2015 LS 460, 2015 NX 200T and RC350, 2017 RC 200T and RX 350. Toyota also removed the 2018-2019 Toyota 4Runner and Land Cruiser and 2018-2019 Lexus GX 460 and LX 570 and 2019 NX300 from inclusion in this recall. On March 19, 2020, Toyota expanded the recall to include 2015 Lexus GS350 vehicles. The low-pressure fuel pump inside the fuel tank may fail.

Risk and remedy

Risk: If the fuel pump fails, the engine can stall while driving, increasing the risk of a crash.

Remedy: Toyota will notify owners, and dealers will replace the fuel pump, free of charge. The recall began May 4, 2020. Owners may contact Toyota customer service at 1-888-270-9371 or Lexus customer service at 1-800-255-3987. Toyota's numbers for this recall are 20TB02 and 20TA02 for Toyota vehicles and 20LB01 and 20LA01 for Lexus vehicles.

All Toyota fuel recalls Look up your tank by VIN

Frequently asked questions

What is the fuel tank capacity of the 2018 Toyota Avalon?

The 2018 Toyota Avalon holds 17.0 gallons (64 liters) on every trim we list.

How many gallons and liters does the 2018 Toyota Avalon gas tank hold?

The 2018 Toyota Avalon tank holds 64 liters, or 17.0 gallons in US gallons.

How far can a 2018 Toyota Avalon go on a full tank?

About 510 miles on the highway and 357 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 go on a quarter tank?

About 128 highway miles or 89 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 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?

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?

About 105 pounds for the 17.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.

Does the 2018 Toyota Avalon have a bigger gas tank than the Ford Fusion?

No. The 2018 Ford Fusion holds up to 18.0 gallons; the 2018 Toyota Avalon holds up to 17.0.

Has the 2018 Toyota Avalon had a fuel pump or fuel system recall?

Yes. NHTSA lists 1 fuel-system recall for the 2018 Toyota Avalon: 20V012000 (delivery · fuel pump). Check your VIN at nhtsa.gov/recalls to see if your car is affected.

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.

Other 2018 Toyota models

8613.2 gallons 4Runner23.0 gallons Avalon Hybrid17.0 gallons C-HR13.2 gallons Camry14.5–16.0 gallons Camry Hybrid13.0 gallons Corolla13.2 gallons Corolla iM14.0 gallons Highlander19.2 gallons Highlander Hybrid17.2–19.2 gallons Land Cruiser24.6 gallons Prius11.3 gallons