2025 head-to-head · Midsize & Large SUV
2025 GMC Hummer EV vs Mazda CX-70
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 2025 GMC Hummer EV is the cheaper one to run. Driving 15,000 miles a year with 18¢/kWh electricity and $3.10/gal regular gas, it costs about $1,725 a year to fuel (53 MPGe), versus $1,860 for the 2025 Mazda CX-70 (25 MPG). That's roughly $135 a year, or about $674 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
- GMC Hummer EV
- Mazda CX-70
Side by side
| GMC Hummer EV | Mazda CX-70 | |
|---|---|---|
| $1,725 | Your annual fuel cost | $1,860 |
| 53 MPGe | Combined efficiency | 25 MPG |
| 59 MPGe | City | 24 MPG |
| 47 MPGe | Highway | 28 MPG |
| 63.9 kWh | Electricity use (kWh/100 mi) | — |
| 318 mi | Driving range | — |
| 0 g/mi | Tailpipe CO₂ (g/mi) | 349 g/mi |
| 8/10 | EPA fuel economy score | 5/10 |
| 10/10 | EPA greenhouse gas score | 5/10 |
| 11.2 hrs | Charge time at 240V | — |
| Electric | Powertrain | Hybrid |
| Electricity | Fuel | Regular gasoline |
| Electric motors (410 kW) | Engine / motor | 3.3L 6-cyl turbo |
| Single-speed | Transmission | 8-speed automatic |
| AWD | Drivetrain | 4WD |
✓ 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.
GMC Hummer EV vs Mazda CX-70 across model years
- GMC Hummer EV
- Mazda CX-70
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 94 2025 midsize & large SUVs, the GMC Hummer EV ranks 23rd and the Mazda CX-70 28th for lowest fuel cost.
Because the GMC Hummer EV is fully electric, it has no tailpipe emissions and its running cost depends almost entirely on your electricity rate. Cheap overnight home charging widens its advantage over the Mazda CX-70; relying on DC fast chargers can erase it.
Frequently asked questions
Which is more fuel-efficient, the 2025 GMC Hummer EV or the 2025 Mazda CX-70?
Measured by cost to drive, the GMC Hummer EV. The GMC Hummer EV is rated 53 MPGe combined and the Mazda CX-70 25 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2025 GMC Hummer EV vs. the Mazda CX-70 per year?
At 15,000 miles a year with 18¢/kWh electricity and $3.10/gal regular gas, about $1,725 for the GMC Hummer EV and $1,860 for the Mazda CX-70.
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