- Gas
- Standard SUVs
- MY2004–2007
Buick Rainier MPG & Fuel Cost by Year
4 model years · 2004–2007
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Buick Rainier fuel economy at a glance
EPA has rated the Buick Rainier for 4 model years, 2004 to 2007. Across those years its combined rating runs 15–17 MPG. The latest model year, 2007, has 4 configurations rated 16–17 MPG combined and costing $3,840–$4,080 a year to fuel at regular gasoline $4.36/gal (U.S. average, Sep 2026). The most efficient configuration on record since 2004 is the 2007 Rainier 5.3L 8-cyl RWD, at 17 MPG.
Buick Rainier MPG by year
| Year | Gas (MPG) | $/yr |
|---|---|---|
| 2004-2007 (2004) Generation page | ||
| 2007 | 16–17 | $3,840–$4,080 |
| 2006 | 16–17 | $3,840–$4,080 |
| 2005 | 15–16 | $4,080–$4,360 |
| 2004 | 15–16 | $4,080–$4,360 |
Costs use the current EIA price set and 15,000 miles a year for every year, so years are comparable. Green marks the best year for each powertrain.
Buick Rainier generations
1 generations between 2004 and 2007. Open one for the table of every model year and configuration.
2007 powertrain options
More Buick models
Frequently asked questions
What is the Buick Rainier's gas mileage by year?
EPA combined ratings for the Buick Rainier run 15–17 MPG across model years 2004 to 2007. The latest year, 2007, is rated 16–17 MPG.
Which Buick Rainier model year has the best gas mileage?
The 2007 Buick Rainier Rainier 5.3L 8-cyl RWD has the highest combined rating since 2004, at 17 MPG.
How much does a Buick Rainier cost to fuel per year?
For MY2007, EPA-rated configurations cost $3,840–$4,080 a year to fuel, driving 15,000 miles at regular gasoline $4.36/gal (U.S. average, Sep 2026). The most efficient one costs $3,840.
Has the Buick Rainier's fuel economy improved over time?
Yes. The most efficient configuration moved from 16 MPG in 2004 to 17 MPG in 2007, 1 MPG more.