Fuel tank capacity
17.5gal · 66 L
The 2000 Buick Century has a fuel tank capacity of 17.5 gallons (66 liters) on every trim.
A full tank is good for roughly 473 highway miles or 315 miles around town, going by the EPA ratings.
17.5 gal · Smaller than 59% of 2000 models we list.
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| Custom 4dr Sedan 3.1L 6cyl 4A · FWD MPG 18 / 27Range 315 / 473 mi | 3.1L 6cyl 4A | FWD | 17.5 gal66 L | 18 / 27 | 315 / 473 mi | |
| Limited 4dr Sedan 3.1L 6cyl 4A · FWD MPG 18 / 27Range 315 / 473 mi | 3.1L 6cyl 4A | FWD | 17.5 gal66 L | 18 / 27 | 315 / 473 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.
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 17.5-gallon tank covers about 368 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 17.5 | 473 | 315 |
| 3/4 | 13.1 | 354 | 236 |
| 1/2 | 8.8 | 236 | 158 |
| 1/4 | 4.4 | 118 | 79 |
| 1/8 | 2.2 | 59 | 39 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 714 gallons, roughly 41 full tanks.
In real driving: owners who log fill-ups at fueleconomy.gov average 24.6 MPG in the Century (13 drivers), about 431 miles on a full 17.5-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.
$74.72 to fill the 17.5-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 |
|---|---|---|---|---|
| 17.5 gal | Regular | $4.27 | $74.72 | $56.04 |
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $70.35 |
| Midwest | $4.27 | $74.72 |
| Gulf CoastLowest | $3.70 | $64.75 |
| Rocky Mountain | $4.46 | $78.05 |
| West Coast | $5.42 | $94.85 |
| CaliforniaHighest | $5.89 | $103.07 |
Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
The 2000 Century uses the same 17.5 gal tank as the 1999 model.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2005 Century | 17.0 gal | 459 mi |
| 2004 Century | 17.0 gal | 459 mi |
| 2003 Century | 17.0 gal | 442 mi |
| 2002 Century | 17.5 gal | 455 mi |
| 2001 Century | 17.5 gal | 455 mi |
| 2000 Century | 17.5 gal | 473 mi |
| 1999 Century | 17.5 gal | 455 mi |
| 1998 Century | 17.0 gal | 459 mi |
| 1997 Century | 17.0 gal | 442 mi |
| 1996 Century | 16.5 gal | 479 mi |
| 1995 Century | 16.5 gal | 429 mi |
At 17.5 gallons, the Century's largest tank ranks third of the seven 2000 sedans compared here. The Mitsubishi Diamante carries the most (19.0 gal) and the Mercury Sable the least (16.0 gal).
| 2000 model | Tank | Longest highway range |
|---|---|---|
| Mitsubishi Diamante | 19.0 gal | 437 mi |
| Nissan Maxima | 18.5 gal | 481 mi |
| Buick Century | 17.5 gal | 473 mi |
| Pontiac Grand Prix | 17.0 gal | 459 mi |
| Oldsmobile Intrigue | 17.0 gal | 442 mi |
| Chevrolet Lumina | 16.6 gal | 448 mi |
| Mercury Sable | 16.0 gal | 416 mi |
Other 2000 sedans of a similar size, one model per brand.
NHTSA lists 1 fuel-system recall for the 2000 Buick Century, out of 5 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.
Vehicle description: passenger vehicles. The clamp that secures the flexible fuel fill hose to the metal fill tube may be loose and could separate.
Risk: This could cause fuel leakage exceeding the permissible amount.
Remedy: Dealers will inspect the fuel hose fill neck clamp and, if necessary, reposition and tighten the clamp.
The 2000 Buick Century holds 17.5 gallons (66 liters) on every trim we list.
The 2000 Buick Century tank holds 66 liters, or 17.5 gallons in US gallons.
About 473 miles on the highway and 315 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.
About 118 highway miles or 79 in town from the 17.5-gallon tank, which has roughly 4.4 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
Drivers who log their fill-ups at fueleconomy.gov average 24.6 MPG in the 2000 Buick Century (13 drivers), which works out to about 431 miles on a full 17.5-gallon tank.
Regular unleaded. The label inside the fuel door confirms it for your car.
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 17.5-gallon tank from empty costs $74.72. It ranges from $64.75 in the Gulf Coast to $103.07 in California.
About 109 pounds for the 17.5-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Yes. The 2000 Buick Century holds up to 17.5 gallons; the 2000 Pontiac Grand Prix holds up to 17.0.
Yes. NHTSA lists 1 fuel-system recall for the 2000 Buick Century: 00V160000 (storage · tank assembly · filler pipe and cap). Check your VIN at nhtsa.gov/recalls to see if your car is affected.
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.