1999 Toyota Avalon Gas Tank Size & Fuel Capacity
Fuel tank capacity
18.5gal · 70 L
The 1999 Toyota Avalon has a fuel tank capacity of 18.5 gallons (70 liters) on every trim.
A full tank is good for roughly 500 highway miles or 352 miles around town, going by the EPA ratings.
18.5 gal · Smaller than 53% of 1999 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- Pump & gauge parts
- FAQ
1999 Toyota Avalon fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| XL 4dr Sedan 3.0L 6cyl 4A · FWD MPG 19 / 27Range 352 / 500 mi | 3.0L 6cyl 4A | FWD | 18.5 gal70 L | 19 / 27 | 352 / 500 mi | |
| XLS 4dr Sedan 3.0L 6cyl 4A · FWD MPG 19 / 27Range 352 / 500 mi | 3.0L 6cyl 4A | FWD | 18.5 gal70 L | 19 / 27 | 352 / 500 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 1999 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 22 MPG, a full 18.5-gallon tank covers about 407 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 18.5 | 500 | 352 |
| 3/4 | 13.9 | 375 | 264 |
| 1/2 | 9.3 | 250 | 176 |
| 1/4 | 4.6 | 125 | 88 |
| 1/8 | 2.3 | 62 | 44 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 682 gallons, roughly 37 full tanks.
In real driving: owners who log fill-ups at fueleconomy.gov average 24.8 MPG in the Avalon (11 drivers), about 459 miles on a full 18.5-gallon tank.
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
- 22 MPG
- Tailpipe CO2
- 404 g/mi
- Source
- EPA ratings
What it costs to fill up a 1999 Toyota Avalon
$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)$2,911
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 1999 Avalon uses the same 18.5 gal tank as every Avalon since 1995.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2004 Avalon | 18.5 gal | 500 mi |
| 2003 Avalon | 18.5 gal | 500 mi |
| 2002 Avalon | 18.5 gal | 500 mi |
| 2001 Avalon | 18.5 gal | 500 mi |
| 2000 Avalon | 18.5 gal | 500 mi |
| 1999 Avalon | 18.5 gal | 500 mi |
| 1998 Avalon | 18.5 gal | 500 mi |
| 1997 Avalon | 18.5 gal | 518 mi |
| 1996 Avalon | 18.5 gal | 481 mi |
| 1995 Avalon | 18.5 gal | 481 mi |
- 2022
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1999 Toyota Avalon vs similar 1999 sedans
At 18.5 gallons, the Avalon's largest tank ranks second of the seven 1999 sedans compared here. The Mitsubishi Diamante carries the most (19.0 gal) and the Ford Taurus the least (16.0 gal).
| 1999 model | Tank | Longest highway range |
|---|---|---|
| Mitsubishi Diamante | 19.0 gal | 418 mi |
| Toyota Avalon | 18.5 gal | 500 mi |
| Mazda Millenia | 18.0 gal | 450 mi |
| Pontiac Grand Prix | 18.0 gal | 486 mi |
| Buick Century | 17.5 gal | 455 mi |
| Chevrolet Lumina | 16.6 gal | 448 mi |
| Ford Taurus | 16.0 gal | 416 mi |
Other 1999 sedans of a similar size, one model per brand.
1999 Toyota Avalon fuel system recalls
None of the 1 recall NHTSA lists for the 1999 Toyota Avalon involve the fuel system.
1999 Toyota Avalon fuel pump and gauge parts
NHTSA lists no fuel-system recall for the 1999 Toyota Avalon, 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 1999 Toyota Avalon?
The 1999 Toyota Avalon holds 18.5 gallons (70 liters) on every trim we list.
How many gallons and liters does the 1999 Toyota Avalon gas tank hold?
The 1999 Toyota Avalon tank holds 70 liters, or 18.5 gallons in US gallons.
How far can a 1999 Toyota Avalon go on a full tank?
About 500 miles on the highway and 352 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 1999 Toyota Avalon go on a quarter tank?
About 125 highway miles or 88 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.
How many miles does a 1999 Toyota Avalon really get on a tank?
Drivers who log their fill-ups at fueleconomy.gov average 24.8 MPG in the 1999 Toyota Avalon (11 drivers), which works out to about 459 miles on a full 18.5-gallon tank.
What gas does the 1999 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 1999 Toyota Avalon?
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 1999 Toyota Avalon?
About 115 pounds for the 18.5-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 1999 Toyota Avalon have a bigger gas tank than the Mazda Millenia?
Yes. The 1999 Toyota Avalon holds up to 18.5 gallons; the 1999 Mazda Millenia holds up to 18.0.
Has the 1999 Toyota Avalon had a fuel pump or fuel system recall?
No. None of the 1 recall NHTSA lists for the 1999 Toyota Avalon 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).
- Real-world MPG: driver-reported fill-ups shared at fueleconomy.gov (My MPG).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.