2026 head-to-head · Midsize & Large SUV
2026 Infiniti QX80 vs Lexus GX
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
4WD · 3.4L 6-cyl turbo · 10-speed automatic · 17 MPG
The 2026 Infiniti QX80 is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $3,292 a year to fuel (18 MPG), versus $3,485 for the 2026 Lexus GX (17 MPG). That's roughly $194 a year, or about $968 over five years.
Your numbers
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Fuel cost over 10 years
- Infiniti QX80
- Lexus GX
Side by side
| Infiniti QX80 | Lexus GX | |
|---|---|---|
| $3,292 | Your annual fuel cost | $3,485 |
| 18 MPG | Combined efficiency | 17 MPG |
| 16 MPG | City | 15 MPG |
| 20 MPG | Highway | 21 MPG |
| 504 g/mi | Tailpipe CO₂ (g/mi) | 505 g/mi |
| 3/10 | EPA fuel economy score | 3/10 |
| 3/10 | EPA greenhouse gas score | 3/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 3.5L 6-cyl turbo | Engine / motor | 3.4L 6-cyl turbo |
| 9-speed automatic | Transmission | 10-speed automatic |
| RWD | 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.
Infiniti QX80 vs Lexus GX across model years
- Infiniti QX80
- Lexus GX
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 91 2026 midsize & large SUVs, the Infiniti QX80 ranks 82nd and the Lexus GX 84th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2026 Infiniti QX80 or the 2026 Lexus GX?
Measured by cost to drive, the Infiniti QX80. The Infiniti QX80 is rated 18 MPG combined and the Lexus GX 17 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 Infiniti QX80 vs. the Lexus GX per year?
At 15,000 miles a year with $3.95/gal premium gas, about $3,292 for the Infiniti QX80 and $3,485 for the Lexus GX.
Infiniti QX80 vs Lexus GX in other years
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