- Newest year: 2009
- Gas
- Midsize cars
2005-2009 Buick Lacrosse/Allure MPG & Fuel Cost
5 model years · 19–21 MPG combined
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 6 of 10 midsize car configurations, MY2009. Ranked against all rated configurations, not sales-weighted.
2005-2009 Buick Lacrosse/Allure at a glance
The 2005-2009 Buick Lacrosse/Allure covers 5 model years in the EPA database (11 configurations in all), rated 19–21 MPG combined. The newest model year, 2009, costs about $3,110 a year to fuel for its most efficient version, the Lacrosse/Allure 3.8L 6-cyl FWD (21 MPG), at regular gasoline $4.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2006, 2007, 2008 and 2009.
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
2005-2009 Buick Lacrosse/Allure by model year
| Model year | Powertrains | Combined | $/yr | EPA ratings |
|---|---|---|---|---|
| 2009 | Gas | 19–21 MPG | $3,110–$3,440 | Ratings changed |
| 2008 | Gas | 19–21 MPG | $3,110–$4,230 | Ratings changed |
| 2007 | Gas | 20–21 MPG | $3,110–$3,270 | Ratings changed |
| 2006 | Gas | 20–21 MPG | $3,110–$3,270 | Ratings changed |
| 2005 | Gas | 20–21 MPG | $3,110–$3,270 | First year |
What the 2009 Lacrosse/Allure 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 midsize car median
$160less a year
Class median $3,270 a year, MY2009
Based on 15,000 miles a year and regular gasoline $4.36/gal (U.S. average, Sep 2026).
2009 Buick Lacrosse/Allure MPG
Versus 2008: 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 |
|---|---|---|---|---|---|---|
| Lacrosse/Allure 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 17 | 28 | 21 | $3,110 |
| Lacrosse/Allure 5.3L 8-cyl | 5.3L 8-cyl | FWD | 16 | 24 | 19 | $3,440 |
2008 Buick Lacrosse/Allure MPG
19–21 MPG · $3,110–$4,230/yr
Versus 2007: The most efficient configuration stays at 21 MPG. Its annual cost stays at $3,110.
Gas configurations (3)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Lacrosse/Allure 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 17 | 28 | 21 | $3,110 |
| Lacrosse/Allure 3.6L 6-cyl | 3.6L 6-cyl | FWD | 17 | 25 | 20 | $3,270 |
| Lacrosse/Allure 5.3L 8-cyl | 5.3L 8-cyl | FWD | 16 | 24 | 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).
2007 Buick Lacrosse/Allure MPG
20–21 MPG · $3,110–$3,270/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Versus 2006: 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 |
|---|---|---|---|---|---|---|
| Lacrosse/Allure 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 17 | 27 | 21 | $3,110 |
| Lacrosse/Allure 3.6L 6-cyl | 3.6L 6-cyl | FWD | 17 | 25 | 20 | $3,270 |
2006 Buick Lacrosse/Allure MPG
20–21 MPG · $3,110–$3,270/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Versus 2005: 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 |
|---|---|---|---|---|---|---|
| Lacrosse/Allure 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 17 | 28 | 21 | $3,110 |
| Lacrosse/Allure 3.6L 6-cyl | 3.6L 6-cyl | FWD | 17 | 25 | 20 | $3,270 |
2005 Buick Lacrosse/Allure MPG
20–21 MPG · $3,110–$3,270/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 |
|---|---|---|---|---|---|---|
| Lacrosse/Allure 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 18 | 27 | 21 | $3,110 |
| Lacrosse/Allure 3.6L 6-cyl | 3.6L 6-cyl | FWD | 17 | 25 | 20 | $3,270 |
Fuel cost by state
Yearly cost of the Lacrosse/Allure 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 MY2009 midsize car models.
Generations
- 2005-2009 (1st gen)
- 2010 (2nd gen)
Frequently asked questions
What gas mileage does the 2005-2009 Buick Lacrosse/Allure get?
EPA rates the 2005-2009 Buick Lacrosse/Allure at 19–21 MPG combined across 11 configurations and 5 model years. The most efficient version, the 2009 Lacrosse/Allure 3.8L 6-cyl FWD, is rated 21 MPG (17 city, 28 highway).
Which years had the best MPG in the 2005-2009 Buick Lacrosse/Allure?
Every model year of the 2005-2009 Buick Lacrosse/Allure tops out at 21 MPG combined, so no year is better than another.
Did EPA ratings change during the 2005-2009 Buick Lacrosse/Allure?
Yes. Ratings changed in 2006, 2007, 2008 and 2009.
How much does it cost to fuel a 2009 Buick Lacrosse/Allure per year?
Driving 15,000 miles a year at regular gasoline $4.36/gal (U.S. average, Sep 2026), the Lacrosse/Allure 3.8L 6-cyl FWD costs about $3,110 a year. Across all 2 configurations the cost runs $3,110–$3,440 a year. That is a $330 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2009 Buick Lacrosse/Allure 100 miles?
About $20.73 per 100 miles for the Lacrosse/Allure 3.8L 6-cyl FWD at regular gasoline $4.36/gal (U.S. average, Sep 2026), and between $20.73 and $22.93 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2009 Buick Lacrosse/Allure more efficient in the city or on the highway?
The Lacrosse/Allure 3.8L 6-cyl FWD is rated 17 city and 28 highway MPG, so it is more efficient on the highway, by 11 MPG.
How does the 2009 Buick Lacrosse/Allure compare with other midsize car configurations?
The Lacrosse/Allure 3.8L 6-cyl FWD costs about $3,110 a year to fuel, $160 less than the class median of $3,270, and less than 6 of 10 midsize car configurations. The comparison covers all 130 rated midsize car configurations for MY2009, not weighted by sales.
Is the 2009 Buick Lacrosse/Allure different from the 2008 model?
The most efficient configuration stays at 21 MPG. Its annual cost stays at $3,110. EPA lists 2 configurations for 2009 against 3 configurations for 2008. See the 2008 Buick Lacrosse/Allure for that year.