Lexus GX vs Lexus LX: fuel economy and fuel cost
In model year 2026 the Lexus LX is the cheaper of the two to fuel: about $4,000 a year for its lowest-cost configuration (LX 700h, 20 MPG combined), against $4,600 for the Lexus GX (GX 550, 17 MPG combined). That is $600 a year, or $3,000 over five years.
Both come from the same maker or parent group. Costs assume 15,000 miles a year and the same fuel and electricity prices for both vehicles, using the EPA combined rating (55% city, 45% highway). Each figure is rounded to $10 and every difference is calculated from the rounded values.
- Gas
- Standard SUVs
Lexus GX
Lowest fuel cost configuration
GX 550
$30.67 per 100 miles
15,000 mi/yr, same fuel prices
1 configuration in MY2026
- Hybrid
- Standard SUVs
Lexus LX
Lowest fuel cost configuration
LX 700h
$26.67 per 100 miles
15,000 mi/yr, same fuel prices
2 configurations in MY2026
What the fuel costs
Annual fuel cost of the lowest-cost configuration
- Lexus GX$4,600 a year · $30.67 per 100 mi
- Lexus LX$4,000 a year · $26.67 per 100 mi
Difference per year
$600
Lexus LX costs less to fuel
Over 5 years
$3,000
$600 a year × 5, 15,000 mi/yr, same fuel prices
Head to head, MY2026
| Measure | Lexus GX | Lexus LX |
|---|---|---|
| Lowest-cost configuration | GX 550 | LX 700h |
| Powertrain | Gas | Hybrid |
| Combined rating | 17 MPG | 20 MPG (better) |
| City rating | 15 MPG | 19 MPG (better) |
| Highway rating | 21 MPG | 22 MPG (better) |
| Annual fuel cost | $4,600/yr | $4,000/yr (better) |
| Cost per 100 miles | $30.67 | $26.67 (better) |
| Annual cost range, all configurations | $4,600 | $4,000–$4,340 |
| Configurations in MY2026 | 1 | 2 |
| EPA class | Standard SUVs | Standard SUVs |
Best configuration by powertrain
| Powertrain | Lexus GX | Lexus LX |
|---|---|---|
| Gas | 17 MPG · $4,600/yr GX 550 | 19 MPG · $4,340/yr LX 600 |
| Hybrid | Not offered in MY2026 | 20 MPG · $4,000/yr LX 700h |
Each cell shows the combined rating and the annual fuel cost of the lowest-cost configuration with that powertrain.
Where each one comes out ahead
Generated from the numbers above, comparing the lowest fuel cost configurations. No subjective judgements.
Lexus GX
Not ahead on any measure listed here.
Lexus LX
- Lower annual fuel cost: $4,000 vs $4,600
- Higher combined rating: 20 MPG vs 17 MPG
- Higher city rating: 19 MPG vs 15 MPG
- Higher highway rating: 22 MPG vs 21 MPG
- Lower annual cost for the best gas configuration: $4,340 vs $4,600
- Offers hybrid configurations in MY2026; the Lexus GX does not
Year by year
| Model year | Lexus GX | Lexus LX | ||
|---|---|---|---|---|
| Combined | Per year | Combined | Per year | |
| 2026 | 17 MPG | $4,600 | 19–20 MPG | $4,000–$4,340 |
| 2025 | 17 MPG | $4,600 | 19–20 MPG | $4,000–$4,340 |
| 2024 | 17 MPG | $4,600 | 19 MPG | $4,340 |
| 2023 | 16 MPG | $4,940 | 19 MPG | $4,340 |
| 2022 | 16 MPG | $4,940 | 19 MPG | $4,340 |
| 2021 | 16 MPG | $4,940 | 14 MPG | $5,790 |
| 2020 | 16 MPG | $4,940 | 14 MPG | $5,790 |
| 2019 | 16 MPG | $4,990 | 15 MPG | $5,400 |
| 2018 | 16 MPG | $4,990 | 15 MPG | $5,400 |
| 2017 | 16 MPG | $4,990 | 15 MPG | $5,390 |
| 2016 | 17 MPG | $4,740 | 15 MPG | $5,400 |
| 2015 | 17 MPG | $4,740 | 14 MPG | $5,630 |
| 2014 | 17 MPG | $4,740 | 14 MPG | $5,630 |
| 2013 | 17 MPG | $4,710 | 14 MPG | $5,630 |
| 2011 | 17 MPG | $4,710 | 14 MPG | $5,580 |
| 2010 | 17 MPG | $4,730 | 14 MPG | $5,740 |
| 2009 | 15 MPG | $5,360 | 14 MPG | $5,740 |
| 2008 | 15 MPG | $5,360 | 14 MPG | $5,740 |
| 2007 | 15 MPG | $5,360 | 13 MPG | $6,180 |
| 2006 | 15 MPG | $5,360 | 13 MPG | $5,030 |
| 2005 | 15 MPG | $4,360 | 13 MPG | $5,030 |
| 2004 | 15 MPG | $4,360 | 13 MPG | $5,030 |
| 2003 | 15 MPG | $4,360 | 13 MPG | $5,030 |
Earlier model years are costed with today's fuel prices, so the table shows how each model's efficiency changed, not what fuel cost at the time. Ranges cover every configuration of that model year.
Frequently asked questions
Which is cheaper to fuel, the Lexus GX or the Lexus LX?
The Lexus LX is cheaper: about $4,000 a year against $4,600 for the Lexus GX, a difference of $600 a year. That compares the lowest-cost configuration of each in model year 2026 at 15,000 miles a year with the same fuel prices.
How much would the Lexus LX save over five years?
About $3,000 ($600 a year for five years), assuming 15,000 miles a year and the same fuel prices. Your total depends on how much you drive and on local prices; see fuel cost by state.
Which has the better fuel economy rating, the Lexus GX or the Lexus LX?
The Lexus LX is rated 20 MPG combined against 17 MPG for the Lexus GX. City: 15 MPG vs 19 MPG. Highway: 21 MPG vs 22 MPG. These are the EPA ratings of each model's lowest-cost configuration.
How is the annual fuel cost calculated?
Distance of 15,000 miles a year at the EPA combined rating (55% city, 45% highway). Gasoline is priced at $4.36/gal (EIA U.S. average for regular, Sep 2026) and electricity at 18.3¢/kWh (EIA U.S. residential average, Jul 2026); premium and diesel configurations use their own EIA prices. Each result is rounded to $10, and differences are calculated from the rounded figures.
Are the Lexus GX and the Lexus LX in the same class?
Yes. The EPA classes both as Standard SUVs.
Explore these cars
- Lexus GX: ratings, trims and every model year
- Lexus LX: ratings, trims and every model year
- 2026 Lexus GX: all configurations
- 2026 Lexus LX: all configurations
More comparisons
- BMW X7 vs Mercedes-Benz GLS-Class
- Cadillac Escalade vs Lincoln Navigator
- Tesla Model X vs BMW iX
- BMW X5 vs Mercedes-Benz GLE-Class
- BMW X5 vs Volvo XC90
- Ford Explorer vs Jeep Grand Cherokee
- Tesla Model S vs Mercedes-Benz EQS
- Tesla Model X vs Rivian R1S
- Chevrolet Suburban vs GMC Yukon
- Ford Expedition vs Toyota Sequoia
- Jeep Wrangler vs Toyota 4Runner
- Rivian R1S vs Rivian R1T
- All curated comparisons