- Newest year: 2008
- Gas
- Hybrid
- Standard SUVs
2008 Mercury Mariner MPG & Fuel Cost
6 configurations · 19–32 MPG combined
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 9 of 10 standard SUV configurations, MY2008. Ranked against all rated configurations, not sales-weighted.
2008 Mercury Mariner at a glance
The 2008 Mercury Mariner has 6 configurations in the EPA database, rated 19–32 MPG combined. The most efficient is the Hybrid 2.3L 4-cyl FWD at 32 MPG, which costs about $2,040 a year to fuel at regular gasoline $4.36/gal (U.S. average, Sep 2026). Annual fuel cost across the configurations runs from $2,040 to $3,440, a $1,400 difference. The Mariner 2.3L 4-cyl FWD costs less to fuel than 9 of 10 standard SUV configurations rated for MY2008 (class median $3,840 a year).
What the 2008 Mariner 2.3L 4-cyl FWD costs to drive
Per month
$248
$2,970 a year ÷ 12
Per 25 miles
$4.95
Per 100 miles
$19.80
Five years
$14,850
5 × the yearly cost, prices held at today's level
vs the standard SUV median
$870less a year
Class median $3,840 a year, MY2008
Based on 15,000 miles a year and regular gasoline $4.36/gal (U.S. average, Sep 2026).
2008 Mercury Mariner MPG
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Mariner 2.3L 4-cyl FWD (Most efficient) | 2.3L 4-cyl | FWD | 20 | 26 | 22 | $2,970 |
| Mariner 2.3L 4-cyl 4WD | 2.3L 4-cyl | 4WD | 19 | 24 | 21 | $3,110 |
| Mariner 3.0L 6-cyl FWD | 3.0L 6-cyl | FWD | 18 | 24 | 20 | $3,270 |
| Mariner 3.0L 6-cyl 4WD | 3.0L 6-cyl | 4WD | 17 | 22 | 19 | $3,440 |
Hybrid configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Hybrid 2.3L 4-cyl FWD (Most efficient) | 2.3L 4-cyl | FWD | 34 | 30 | 32 | $2,040 |
| Hybrid 2.3L 4-cyl 4WD | 2.3L 4-cyl | 4WD | 29 | 27 | 28 | $2,330 |
Fuel cost by state
Yearly cost of the Mariner 2.3L 4-cyl FWD: $4,040 in California and $2,590 in Texas, a $1,450 difference.
- California $4,040
- Washington $3,740
- New York $2,970
- Florida $2,810
- Texas $2,590
Similar cars
Closest combined MPG among MY2008 standard SUV models.
Generations
Frequently asked questions
How does the 2008 Mercury Mariner compare with the previous generation?
The previous generation (2005-2007 Mercury Mariner) is rated 18–27 MPG combined and costs $2,420–$3,630 a year to fuel; the 2008 model is rated 19–32 MPG and costs $2,040–$3,440 a year.
What gas mileage does the 2008 Mercury Mariner get?
EPA rates the 2008 Mercury Mariner at 19–32 MPG combined across 6 configurations. The most efficient, the Hybrid 2.3L 4-cyl FWD, is rated 32 MPG combined (34 city / 30 highway). By powertrain: Gas: 19–22 MPG; Hybrid: 28–32 MPG.
How much does it cost to fuel a 2008 Mercury Mariner per year?
Driving 15,000 miles a year at regular gasoline $4.36/gal (U.S. average, Sep 2026), the Mariner 2.3L 4-cyl FWD costs about $2,970 a year. Across all 6 configurations the cost runs $2,040–$3,440 a year. That is a $1,400 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2008 Mercury Mariner 100 miles?
About $19.80 per 100 miles for the Mariner 2.3L 4-cyl FWD at regular gasoline $4.36/gal (U.S. average, Sep 2026), and between $13.60 and $22.93 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2008 Mercury Mariner more efficient in the city or on the highway?
The Mariner 2.3L 4-cyl FWD is rated 20 city and 26 highway MPG, so it is more efficient on the highway, by 6 MPG.
How does the 2008 Mercury Mariner compare with other standard SUV configurations?
The Mariner 2.3L 4-cyl FWD costs about $2,970 a year to fuel, $870 less than the class median of $3,840, and less than 9 of 10 standard SUV configurations. The comparison covers all 334 rated standard SUV configurations for MY2008, not weighted by sales.
Is the 2008 Mercury Mariner hybrid cheaper to fuel than the gas version?
Yes. The best hybrid (Hybrid 2.3L 4-cyl FWD) is rated 32 MPG against 22 MPG for the best gas version (Mariner 2.3L 4-cyl FWD), 10 MPG more. At regular gasoline $4.36/gal (U.S. average, Sep 2026) that is $2,040 versus $2,970 a year, a saving of $930.
Is the 2008 Mercury Mariner different from the 2007 model?
The most efficient configuration moves from 27 to 32 MPG, up 5. Its annual cost goes from $2,420 to $2,040, $380 less. EPA lists 6 configurations for 2008 against 5 configurations for 2007. See the 2007 Mercury Mariner for that year.