- Newest year: 2005
- Gas
- Large cars
2000-2005 Buick Park Avenue MPG & Fuel Cost
6 model years · 19–21 MPG combined
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 8 of 10 large car configurations, MY2005. Ranked against all rated configurations, not sales-weighted.
2000-2005 Buick Park Avenue at a glance
The 2000-2005 Buick Park Avenue covers 6 model years in the EPA database (12 configurations in all), rated 19–21 MPG combined. The newest model year, 2005, costs about $3,110 a year to fuel for its most efficient version, the Park Avenue 3.8L 6-cyl FWD (21 MPG), at regular gasoline $4.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2001, 2002, 2004 and 2005; 2003 repeat the values of the year before. The best combined rating in the generation, 21 MPG, was reached in 2002, 2003, 2004 and 2005.
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
2000-2005 Buick Park Avenue by model year
| Model year | Powertrains | Combined | $/yr | EPA ratings |
|---|---|---|---|---|
| 2005 | Gas | 20–21 MPG | $3,110–$4,020 | Ratings changed |
| 2004 | Gas | 20–21 MPG | $3,110–$4,020 | Ratings changed |
| 2003 | Gas | 19–21 MPG | $3,110–$4,230 | Same EPA ratings as 2002 |
| 2002 | Gas | 19–21 MPG | $3,110–$4,230 | Ratings changed |
| 2001 | Gas | 20 MPG | $3,270–$4,020 | Ratings changed |
| 2000 | Gas | 19–20 MPG | $3,270–$4,230 | First year |
What the 2005 Park Avenue 3.8L 6-cyl FWD costs to drive
Per month
$259
$3,110 a year ÷ 12
Per 25 miles
$5.18
Per 100 miles
$20.73
Five years
$15,550
5 × the yearly cost, prices held at today's level
vs the large car median
$970less a year
Class median $4,080 a year, MY2005
Based on 15,000 miles a year and regular gasoline $4.36/gal (U.S. average, Sep 2026).
2005 Buick Park Avenue MPG
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Versus 2004: The most efficient configuration stays at 21 MPG. Its annual cost stays at $3,110.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Park Avenue 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 18 | 27 | 21 | $3,110 |
| Park Avenue 3.8L 6-cyl supercharged | 3.8L 6-cyl supercharged | FWD | 17 | 26 | 20 | $4,020 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2004 Buick Park Avenue MPG
20–21 MPG · $3,110–$4,020/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Versus 2003: The most efficient configuration stays at 21 MPG. Its annual cost stays at $3,110.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Park Avenue 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 18 | 27 | 21 | $3,110 |
| Park Avenue 3.8L 6-cyl supercharged | 3.8L 6-cyl supercharged | FWD | 16 | 26 | 20 | $4,020 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2003 Buick Park Avenue MPG
Same EPA ratings as 2002
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
EPA lists the same ratings for the 2003 Buick Park Avenue as for the 2002 model, so the configurations and costs are the ones in the 2002 section above.See 2002
2002 Buick Park Avenue MPG
19–21 MPG · $3,110–$4,230/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Versus 2001: The most efficient configuration moves from 20 to 21 MPG, up 1. Its annual cost goes from $3,270 to $3,110, $160 less.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Park Avenue 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 17 | 27 | 21 | $3,110 |
| Park Avenue 3.8L 6-cyl supercharged | 3.8L 6-cyl supercharged | FWD | 16 | 25 | 19 | $4,230 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2001 Buick Park Avenue MPG
20 MPG · $3,270–$4,020/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Versus 2000: The most efficient configuration stays at 20 MPG. Its annual cost stays at $3,270.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Park Avenue 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 17 | 27 | 20 | $3,270 |
| Park Avenue 3.8L 6-cyl supercharged | 3.8L 6-cyl supercharged | FWD | 16 | 26 | 20 | $4,020 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2000 Buick Park Avenue MPG
19–20 MPG · $3,270–$4,230/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Park Avenue 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 17 | 27 | 20 | $3,270 |
| Park Avenue 3.8L 6-cyl supercharged | 3.8L 6-cyl supercharged | FWD | 16 | 25 | 19 | $4,230 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Fuel cost by state
Yearly cost of the Park Avenue 3.8L 6-cyl FWD: $4,230 in California and $2,710 in Texas, a $1,520 difference.
- California $4,230
- Washington $3,920
- New York $3,110
- Florida $2,940
- Texas $2,710
Similar cars
Closest combined MPG among MY2005 large car models.
Generations
- 2000-2005 (2nd gen)
Frequently asked questions
What gas mileage does the 2000-2005 Buick Park Avenue get?
EPA rates the 2000-2005 Buick Park Avenue at 19–21 MPG combined across 12 configurations and 6 model years. The most efficient version, the 2005 Park Avenue 3.8L 6-cyl FWD, is rated 21 MPG (18 city, 27 highway).
Which years had the best MPG in the 2000-2005 Buick Park Avenue?
The Park Avenue 3.8L 6-cyl FWD reached the generation's best combined rating, 21 MPG, in 2002, 2003, 2004 and 2005. The lowest top rating, 20 MPG, was in 2000 and 2001.
Did EPA ratings change during the 2000-2005 Buick Park Avenue?
Yes. Ratings changed in 2001, 2002, 2004 and 2005. In 2003 the values repeat the year before.
How much does it cost to fuel a 2005 Buick Park Avenue per year?
Driving 15,000 miles a year at regular gasoline $4.36/gal (U.S. average, Sep 2026), the Park Avenue 3.8L 6-cyl FWD costs about $3,110 a year. Across all 2 configurations the cost runs $3,110–$4,020 a year. That is a $910 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2005 Buick Park Avenue 100 miles?
About $20.73 per 100 miles for the Park Avenue 3.8L 6-cyl FWD at regular gasoline $4.36/gal (U.S. average, Sep 2026), and between $20.73 and $26.80 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2005 Buick Park Avenue more efficient in the city or on the highway?
The Park Avenue 3.8L 6-cyl FWD is rated 18 city and 27 highway MPG, so it is more efficient on the highway, by 9 MPG.
How does the 2005 Buick Park Avenue compare with other large car configurations?
The Park Avenue 3.8L 6-cyl FWD costs about $3,110 a year to fuel, $970 less than the class median of $4,080, and less than 8 of 10 large car configurations. The comparison covers all 56 rated large car configurations for MY2005, not weighted by sales.
Is the 2005 Buick Park Avenue different from the 2004 model?
The most efficient configuration stays at 21 MPG. Its annual cost stays at $3,110. EPA lists 2 configurations for 2005 against 2 configurations for 2004. See the 2004 Buick Park Avenue for that year.