2015 head-to-head · Midsize Car
2015 Buick LaCrosse vs Roush Performance Mustang
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
The 2015 Buick LaCrosse is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas and $3.95/gal premium gas, it costs about $2,214 a year to fuel (21 MPG), versus $3,703 for the 2015 Roush Performance Mustang (16 MPG). That's roughly $1,489 a year, or about $7,444 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- Buick LaCrosse
- Roush Performance Mustang
Side by side
| Buick LaCrosse | Roush Performance Mustang | |
|---|---|---|
| $2,214 | Your annual fuel cost | $3,703 |
| 21 MPG | Combined efficiency | 16 MPG |
| 18 MPG | City | 13 MPG |
| 28 MPG | Highway | 23 MPG |
| 100 cu ft | Passenger volume | 98 cu ft |
| 16 cu ft | Cargo volume | 13 cu ft |
| 419 g/mi | Tailpipe CO₂ (g/mi) | 553 g/mi |
| 5/10 | EPA fuel economy score | 3/10 |
| 5/10 | EPA greenhouse gas score | 3/10 |
| Gas | Powertrain | Gas |
| Regular gasoline | Fuel | Premium gasoline |
| 3.6L 6-cyl | Engine / motor | 5.0L 8-cyl supercharged |
| 6-speed automatic | Transmission | 6-speed automatic |
| FWD | Drivetrain | RWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
Buick LaCrosse vs Roush Performance Mustang across model years
- Buick LaCrosse
- Roush Performance Mustang
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Per EPA interior volume figures, the Buick LaCrosse has more cargo space (16 vs. 13 cu ft).
Among 69 2015 midsize cars, the Buick LaCrosse ranks 46th and the Roush Performance Mustang 66th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2015 Buick LaCrosse or the 2015 Roush Performance Mustang?
Measured by cost to drive, the Buick LaCrosse. The Buick LaCrosse is rated 21 MPG combined and the Roush Performance Mustang 16 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 Buick LaCrosse vs. the Roush Performance Mustang per year?
At 15,000 miles a year with $3.10/gal regular gas and $3.95/gal premium gas, about $2,214 for the Buick LaCrosse and $3,703 for the Roush Performance Mustang.
Which has more cargo space?
The Buick LaCrosse, with 16 cu ft of luggage volume versus 13 cu ft (EPA interior volume index).
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