Which is the most fuel-efficient Lexus?
The all-electric Lexus RZ 450e currently leads the field in energy efficiency, measured in MPGe. Among conventional hybrids, the UX 250h and NX 350h deliver the strongest gasoline mpg, while other models fall behind in efficiency.
Electric vs. hybrid efficiency: what to look for
When talking about fuel efficiency, there are two metrics to consider: MPGe for electric and plug-in hybrid models, and mpg for regular hybrids and gasoline-only models. EVs and plug-in hybrids can show higher energy efficiency in MPGe, since they use electricity as a primary energy source. Non-electric hybrids report miles per gallon (mpg) based on how efficiently they burn gasoline over mixed driving.
What this means for Lexus shoppers
If you want the highest overall energy efficiency, an EV like the RZ 450e is the benchmark. If you’re primarily interested in maximizing gasoline mpg, the current hybrids such as UX 250h and NX 350h offer the best numbers in the Lexus lineup.
Top fuel-efficient Lexus models (electric and hybrids)
Below are the most efficient Lexus models in their respective drivetrains. The figures are EPA estimates and can vary with trim, wheel size, and driving conditions. The all-electric option naturally leads in energy efficiency, while the hybrids maximize miles per gallon on gasoline.
- Lexus RZ 450e — all-electric SUV; highest energy efficiency in the lineup with an EPA MPGe rating in the upper 80s to low 90s, depending on configuration.
- Lexus UX 250h — hybrid; about 39 mpg combined (roughly 40 mpg city, around 37–38 mpg highway).
- Lexus NX 350h — hybrid; about 39 mpg combined (values vary slightly by trim and driving style).
In this group, the RZ 450e stands out for energy efficiency because it runs on electricity, not gasoline, while the UX 250h and NX 350h show the strongest gasoline mpg among Lexus hybrids currently on sale.
Plug-in hybrid option: NX 450h+
For buyers seeking a bridge between electric capability and gasoline range, the NX 450h+ plug-in hybrid offers significant electric-only range and solid MPGe when running in all-electric or combined modes. The electric range allows many daily trips to be completed with electricity alone, while the gasoline engine provides extended range for longer drives.
- Lexus NX 450h+ — plug-in hybrid; electric-only range of roughly 30–40 miles (varies by model year and trim); EPA MPGe in the 70s–80s range, with conventional mpg in the low 30s when relying on gasoline after the battery is depleted.
Plug-in hybrids like the NX 450h+ expand the definition of efficiency by offering substantial electric-mode energy savings while maintaining flexibility for longer trips.
Bottom line for buyers
If the goal is maximum energy efficiency, the RZ 450e is the clear leader among Lexus models. For those prioritizing gasoline mpg without stepping into full electric driving, the UX 250h and NX 350h are the most efficient choices in Lexus’s current lineup. Plug-in hybrids such as the NX 450h+ offer a practical mix of electric range and gasoline efficiency for those who want to reduce fuel use while retaining long-trip capability.
Summary
- The most fuel-efficient Lexus overall is the all-electric RZ 450e (highest MPGe).
- Among non-electric hybrids, the UX 250h and NX 350h deliver the best gasoline mpg, typically around 39 mpg combined.
- Plug-in hybrids like the NX 450h+ provide substantial electric range and strong MPGe, balancing electric efficiency with gasoline flexibility.
For buyers budgeting fuel costs or seeking a lower environmental footprint, Lexus’s current mix of EV, hybrid, and plug-in hybrid models offers clear efficiency advantages across different driving needs.
