2026 head-to-head · Midsize & Large SUV
2026 BMW iX vs Cadillac Optiq
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 2026 Cadillac Optiq is the cheaper one to run. Driving 15,000 miles a year with 18¢/kWh electricity, it costs about $867 a year to fuel (105 MPGe), versus $937 for the 2026 BMW iX (97 MPGe). That's roughly $70 a year, or about $351 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
- BMW iX
- Cadillac Optiq
Side by side
| BMW iX | Cadillac Optiq | |
|---|---|---|
| $937 | Your annual fuel cost | $867 |
| 97 MPGe | Combined efficiency | 105 MPGe |
| 99 MPGe | City | 117 MPGe |
| 94 MPGe | Highway | 93 MPGe |
| 34.7 kWh | Electricity use (kWh/100 mi) | 32.1 kWh |
| 364 mi | Driving range | 317 mi |
| — | Passenger volume | 102 cu ft |
| — | Cargo volume | 26 cu ft |
| 0 g/mi | Tailpipe CO₂ (g/mi) | 0 g/mi |
| 9/10 | EPA fuel economy score | 9/10 |
| 10/10 | EPA greenhouse gas score | 10/10 |
| 11 hrs | Charge time at 240V | 9.5 hrs |
| Electric | Powertrain | Electric |
| Electricity | Fuel | Electricity |
| Electric motors (420 kW) | Engine / motor | Electric motors (465 kW) |
| Single-speed | Transmission | Single-speed |
| AWD | 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.
BMW iX vs Cadillac Optiq across model years
- BMW iX
- Cadillac Optiq
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
The BMW iX goes farther between stops: about 364 miles on a charge, compared with 317 miles for the Cadillac Optiq.
Among 91 2026 midsize & large SUVs, the BMW iX ranks 8th and the Cadillac Optiq 3rd for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2026 BMW iX or the 2026 Cadillac Optiq?
Measured by cost to drive, the Cadillac Optiq. The BMW iX is rated 97 MPGe combined and the Cadillac Optiq 105 MPGe (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 BMW iX vs. the Cadillac Optiq per year?
At 15,000 miles a year with 18¢/kWh electricity, about $937 for the BMW iX and $867 for the Cadillac Optiq.
Which has more range?
The BMW iX: about 364 miles versus 317 miles.
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