- Newest year: 2007
- Gas
- Standard SUVs
2004-2007 Buick Rainier MPG & Fuel Cost
4 model years · 15–17 MPG combined
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 5 of 10 standard SUV configurations, MY2007. Ranked against all rated configurations, not sales-weighted.
2004-2007 Buick Rainier at a glance
The 2004-2007 Buick Rainier covers 4 model years in the EPA database (16 configurations in all), rated 15–17 MPG combined. The newest model year, 2007, costs about $3,840 a year to fuel for its most efficient version, the Rainier 5.3L 8-cyl RWD (17 MPG), at regular gasoline $4.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2005, 2006 and 2007. The best combined rating in the generation, 17 MPG, was reached in 2006 and 2007.
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
2004-2007 Buick Rainier by model year
| Model year | Powertrains | Combined | $/yr | EPA ratings |
|---|---|---|---|---|
| 2007 | Gas | 16–17 MPG | $3,840–$4,080 | Ratings changed |
| 2006 | Gas | 16–17 MPG | $3,840–$4,080 | Ratings changed |
| 2005 | Gas | 15–16 MPG | $4,080–$4,360 | Ratings changed |
| 2004 | Gas | 15–16 MPG | $4,080–$4,360 | First year |
What the 2007 Rainier 5.3L 8-cyl RWD costs to drive
Per month
$320
$3,840 a year ÷ 12
Per 25 miles
$6.40
Per 100 miles
$25.60
Five years
$19,200
5 × the yearly cost, prices held at today's level
vs the standard SUV median
$180less a year
Class median $4,020 a year, MY2007
Based on 15,000 miles a year and regular gasoline $4.36/gal (U.S. average, Sep 2026).
2007 Buick Rainier MPG
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 17 MPG. Its annual cost stays at $3,840.
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Rainier 5.3L 8-cyl RWD (Most efficient) | 5.3L 8-cyl | RWD | 14 | 20 | 17 | $3,840 |
| Rainier 4.2L 6-cyl 4WD | 4.2L 6-cyl | 4WD | 14 | 20 | 16 | $4,080 |
| Rainier 4.2L 6-cyl RWD | 4.2L 6-cyl | RWD | 14 | 20 | 16 | $4,080 |
| Rainier 5.3L 8-cyl 4WD | 5.3L 8-cyl | 4WD | 13 | 19 | 16 | $4,080 |
2006 Buick Rainier MPG
16–17 MPG · $3,840–$4,080/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 moves from 16 to 17 MPG, up 1. Its annual cost goes from $4,080 to $3,840, $240 less.
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Rainier 5.3L 8-cyl RWD (Most efficient) | 5.3L 8-cyl | RWD | 14 | 20 | 17 | $3,840 |
| Rainier 4.2L 6-cyl RWD | 4.2L 6-cyl | RWD | 14 | 20 | 16 | $4,080 |
| Rainier 4.2L 6-cyl 4WD | 4.2L 6-cyl | 4WD | 14 | 20 | 16 | $4,080 |
| Rainier 5.3L 8-cyl 4WD | 5.3L 8-cyl | 4WD | 14 | 20 | 16 | $4,080 |
2005 Buick Rainier MPG
15–16 MPG · $4,080–$4,360/yr
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 16 MPG. Its annual cost stays at $4,080.
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Rainier 4.2L 6-cyl RWD (Most efficient) | 4.2L 6-cyl | RWD | 14 | 20 | 16 | $4,080 |
| Rainier 5.3L 8-cyl RWD | 5.3L 8-cyl | RWD | 14 | 19 | 16 | $4,080 |
| Rainier 4.2L 6-cyl 4WD | 4.2L 6-cyl | 4WD | 14 | 19 | 16 | $4,080 |
| Rainier 5.3L 8-cyl 4WD | 5.3L 8-cyl | 4WD | 14 | 17 | 15 | $4,360 |
2004 Buick Rainier MPG
15–16 MPG · $4,080–$4,360/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Rainier 4.2L 6-cyl RWD (Most efficient) | 4.2L 6-cyl | RWD | 14 | 19 | 16 | $4,080 |
| Rainier 5.3L 8-cyl RWD | 5.3L 8-cyl | RWD | 14 | 18 | 16 | $4,080 |
| Rainier 4.2L 6-cyl 4WD | 4.2L 6-cyl | 4WD | 14 | 19 | 16 | $4,080 |
| Rainier 5.3L 8-cyl 4WD | 5.3L 8-cyl | 4WD | 13 | 17 | 15 | $4,360 |
Fuel cost by state
Yearly cost of the Rainier 5.3L 8-cyl RWD: $5,230 in California and $3,350 in Texas, a $1,880 difference.
- California $5,230
- Washington $4,840
- New York $3,840
- Florida $3,630
- Texas $3,350
Similar cars
Closest combined MPG among MY2007 standard SUV models.
Generations
- 2004-2007 (2004)
Frequently asked questions
What gas mileage does the 2004-2007 Buick Rainier get?
EPA rates the 2004-2007 Buick Rainier at 15–17 MPG combined across 16 configurations and 4 model years. The most efficient version, the 2007 Rainier 5.3L 8-cyl RWD, is rated 17 MPG (14 city, 20 highway).
Which years had the best MPG in the 2004-2007 Buick Rainier?
The Rainier 5.3L 8-cyl RWD reached the generation's best combined rating, 17 MPG, in 2006 and 2007. The lowest top rating, 16 MPG, was in 2004 and 2005.
Did EPA ratings change during the 2004-2007 Buick Rainier?
Yes. Ratings changed in 2005, 2006 and 2007.
How much does it cost to fuel a 2007 Buick Rainier per year?
Driving 15,000 miles a year at regular gasoline $4.36/gal (U.S. average, Sep 2026), the Rainier 5.3L 8-cyl RWD costs about $3,840 a year. Across all 4 configurations the cost runs $3,840–$4,080 a year. That is a $240 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2007 Buick Rainier 100 miles?
About $25.60 per 100 miles for the Rainier 5.3L 8-cyl RWD at regular gasoline $4.36/gal (U.S. average, Sep 2026), and between $25.60 and $27.20 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2007 Buick Rainier more efficient in the city or on the highway?
The Rainier 5.3L 8-cyl RWD is rated 14 city and 20 highway MPG, so it is more efficient on the highway, by 6 MPG.
How does the 2007 Buick Rainier compare with other standard SUV configurations?
The Rainier 5.3L 8-cyl RWD costs about $3,840 a year to fuel, $180 less than the class median of $4,020, and less than 5 of 10 standard SUV configurations. The comparison covers all 325 rated standard SUV configurations for MY2007, not weighted by sales.
Is the 2007 Buick Rainier different from the 2006 model?
The most efficient configuration stays at 17 MPG. Its annual cost stays at $3,840. EPA lists 4 configurations for 2007 against 4 configurations for 2006. See the 2006 Buick Rainier for that year.