2005 Buick LeSabre Gas Tank Size & Fuel Capacity
Fuel tank capacity
18.0gal · 68 L
The 2005 Buick LeSabre has a fuel tank capacity of 18.0 gallons (68 liters) on every trim.
A full tank is good for roughly 486 highway miles or 324 miles around town, going by the EPA ratings.
18.0 gal · Smaller than 64% of 2005 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Pump & gauge parts
- FAQ
2005 Buick LeSabre fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| Custom 4dr Sedan 3.8L 6cyl 4A · FWD MPG 18 / 27Range 324 / 486 mi | 3.8L 6cyl 4A | FWD | 18.0 gal68 L | 18 / 27 | 324 / 486 mi | |
| Limited 4dr Sedan 3.8L 6cyl 4A · FWD MPG 18 / 27Range 324 / 486 mi | 3.8L 6cyl 4A | FWD | 18.0 gal68 L | 18 / 27 | 324 / 486 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 2005 Buick LeSabre 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 21 MPG, a full 18.0-gallon tank covers about 378 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 18.0 | 486 | 324 |
| 3/4 | 13.5 | 365 | 243 |
| 1/2 | 9.0 | 243 | 162 |
| 1/4 | 4.5 | 122 | 81 |
| 1/8 | 2.3 | 61 | 41 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 714 gallons, roughly 40 full tanks.
In real driving: owners who log fill-ups at fueleconomy.gov average 26.3 MPG in the LeSabre (9 drivers), about 473 miles on a full 18.0-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
- 21 MPG
- Tailpipe CO2
- 423 g/mi
- Source
- EPA ratings
What it costs to fill up a 2005 Buick LeSabre
$76.86 to fill the 18.0-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 |
|---|---|---|---|---|
| 18.0 gal | Regular | $4.27 | $76.86 | $57.64 |
By region, 18.0-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $72.36 |
| Midwest | $4.27 | $76.86 |
| Gulf CoastLowest | $3.70 | $66.60 |
| Rocky Mountain | $4.46 | $80.28 |
| West Coast | $5.42 | $97.56 |
| CaliforniaHighest | $5.89 | $106.02 |
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
- 18.0-gallon tank$76.86
- A year of driving (15,000 mi)$3,050
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
LeSabre tank size in other years
The 2005 LeSabre uses the same 18.0 gal tank as the 2004 model.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2005 LeSabre | 18.0 gal | 486 mi |
| 2004 LeSabre | 18.0 gal | 486 mi |
| 2003 LeSabre | 18.5 gal | 500 mi |
| 2002 LeSabre | 18.5 gal | 500 mi |
| 2001 LeSabre | 18.5 gal | 500 mi |
| 2000 LeSabre | 18.5 gal | 500 mi |
2005 Buick LeSabre vs similar 2005 sedans
At 18.0 gallons, the LeSabre's largest tank ranks fourth of the six 2005 sedans compared here. The Chrysler 300 carries the most (19.0 gal) and the Chevrolet Impala the least (17.0 gal).
| 2005 model | Tank | Longest highway range |
|---|---|---|
| Chrysler 300 | 18.0–19.0 gal | 468 mi |
| Toyota Avalon | 18.5 gal | 518 mi |
| Kia Amanti | 18.5 gal | 426 mi |
| Buick LeSabre | 18.0 gal | 486 mi |
| Ford Taurus | 18.0 gal | 450 mi |
| Chevrolet Impala | 17.0 gal | 493 mi |
Other 2005 sedans of a similar size, one model per brand.
2005 Buick LeSabre fuel pump and gauge parts
These are the part numbers the makers list for the 2005 Buick LeSabre. Check the fuel system recalls first: recall repairs are free.
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Frequently asked questions
What is the fuel tank capacity of the 2005 Buick LeSabre?
The 2005 Buick LeSabre holds 18.0 gallons (68 liters) on every trim we list.
How many gallons and liters does the 2005 Buick LeSabre gas tank hold?
The 2005 Buick LeSabre tank holds 68 liters, or 18.0 gallons in US gallons.
How far can a 2005 Buick LeSabre go on a full tank?
About 486 miles on the highway and 324 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 2005 Buick LeSabre go on a quarter tank?
About 122 highway miles or 81 in town from the 18.0-gallon tank, which has roughly 4.5 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
How many miles does a 2005 Buick LeSabre really get on a tank?
Drivers who log their fill-ups at fueleconomy.gov average 26.3 MPG in the 2005 Buick LeSabre (9 drivers), which works out to about 473 miles on a full 18.0-gallon tank.
What gas does the 2005 Buick LeSabre take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2005 Buick LeSabre?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 18.0-gallon tank from empty costs $76.86. It ranges from $66.60 in the Gulf Coast to $106.02 in California.
How much does a full tank of gas weigh in a 2005 Buick LeSabre?
About 112 pounds for the 18.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2005 Buick LeSabre have a bigger gas tank than the Toyota Avalon?
No. The 2005 Toyota Avalon holds up to 18.5 gallons; the 2005 Buick LeSabre holds up to 18.0.
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).
- 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.