2021 head-to-head · Small SUV
2021 BMW X3 vs Cadillac XT6
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
On fuel costs these two are nearly tied. Driving 15,000 miles a year with $3.95/gal premium gas and $3.10/gal regular gas, the most efficient 2021 BMW X3 (27 MPG) costs about $2,194 a year to fuel and the 2021 Cadillac XT6 (21 MPG) about $2,214.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- BMW X3
- Cadillac XT6
Side by side
| BMW X3 | Cadillac XT6 | |
|---|---|---|
| $2,194 | Your annual fuel cost | $2,214 |
| 27 MPG | Combined efficiency | 21 MPG |
| 25 MPG | City | 19 MPG |
| 29 MPG | Highway | 26 MPG |
| 332 g/mi | Tailpipe CO₂ (g/mi) | 418 g/mi |
| 6/10 | EPA fuel economy score | 4/10 |
| 6/10 | EPA greenhouse gas score | 4/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Regular gasoline |
| 2.0L 4-cyl turbo | Engine / motor | 3.6L 6-cyl |
| 8-speed automatic | Transmission | 9-speed automatic |
| RWD | Drivetrain | FWD |
✓ 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.
BMW X3 vs Cadillac XT6 across model years
- BMW X3
- Cadillac XT6
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
Among 92 2021 small SUVs, the BMW X3 ranks 66th and the Cadillac XT6 70th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2021 BMW X3 or the 2021 Cadillac XT6?
Measured by cost to drive, the BMW X3. The BMW X3 is rated 27 MPG combined and the Cadillac XT6 21 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2021 BMW X3 vs. the Cadillac XT6 per year?
At 15,000 miles a year with $3.95/gal premium gas and $3.10/gal regular gas, about $2,194 for the BMW X3 and $2,214 for the Cadillac XT6.
BMW X3 vs Cadillac XT6 in other years
More 2021 comparisons
BMW X3 vs…
Or compare the 2021 BMW X3 with anything else: