For a 2024 sedan, the answer depends on what you mean by “full-size” and whether you count electric vehicles. In the U.S. Department of Energy and Environmental Protection Agency’s 2024 Fuel Economy Guide, the large-car electric leader is the Lucid Air Pure RWD with 19-inch wheels, rated at 137 MPGe; the conventional leader is the Honda Accord Hybrid at 48 MPG. Toyota markets the 2024 Crown as a full-size sedan: its XLE and Limited trims are rated at 41 MPG combined, while the Platinum is rated at 30 MPG combined.
Scope note: “Full-size” is Toyota’s market description of the Crown, while “large cars” is the DOE/EPA guide’s class label. MPGe is an electric-vehicle energy-equivalent rating; MPG is a gasoline fuel-economy rating, so the figures are not directly interchangeable.
Which 2024 sedan is the most fuel-efficient?
Under the DOE/EPA guide’s “large cars” category, the Lucid Air Pure RWD with 19-inch wheels is the electric leader at 137 MPGe. The guide lists the Honda Accord Hybrid as the conventional leader at 48 MPG. It reports these as separate leaders because an EV’s MPGe rating and a conventional vehicle’s MPG rating use different units.
The guide says its rankings use combined city and highway estimates, assuming 55% city driving and 45% highway driving. Its figures are standardized comparison ratings, not a guarantee of the mileage any particular driver will get.
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How the 2024 Crown compares
Toyota and Kelley Blue Book describe the 2024 Crown as a full-size sedan. The DOE/EPA guide, however, places Crown AWD listings before its “LARGE CARS” heading rather than listing them among that class’s leaders. If you mean the full-size sedan Toyota markets, the Crown’s trim and powertrain matter:
| 2024 Crown trim or powertrain | City | Highway | Combined |
|---|---|---|---|
| XLE and Limited, 2.5-liter hybrid, AWD | 42 MPG | 41 MPG | 41 MPG |
| Platinum, 2.4-liter hybrid, AWD | 29 MPG | 32 MPG | 30 MPG |
Toyota’s 2024 model brochure gives the XLE and Limited ratings as EPA estimates of 42 city, 41 highway, and 41 combined MPG; the Platinum is estimated at 29 city, 32 highway, and 30 combined MPG. The DOE/EPA guide’s Crown AWD listings report 41 MPG combined for the 2.5-liter hybrid and 30 MPG for the 2.4-liter hybrid.
Rank #2
- An import form Aoshima
- Patrol car grille and sub-mirrors
- LED display unit
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What the ratings mean in practice
MPGe is not MPG
MPGe expresses an EV’s energy use on a gasoline-equivalent basis. MPG reports miles traveled per gallon of gasoline. The Lucid’s 137 MPGe and the Accord Hybrid’s 48 MPG can identify the leaders within their respective categories, but they do not represent equivalent measurements of the same fuel.
EPA estimates are comparison tools
The EPA says annual fuel-economy data comes from testing at its National Vehicle and Fuel Emissions Laboratory and from manufacturer-submitted test data. Actual results can differ: Toyota notes that Crown mileage varies with vehicle condition and driving conditions. For a used vehicle, the EPA’s used-vehicle fuel economy label lookup allows searches by model year, make, model, engine, and transmission; the original estimate is a useful indicator for a properly maintained vehicle, not a promise of current performance.
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Rank #3
- An import form Aoshima
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Which figure should you use?
- Comparing electric large cars: use the Lucid Air Pure RWD’s 137 MPGe rating and note its 19-inch wheels.
- Comparing conventional large cars: use the Honda Accord Hybrid’s 48 MPG rating.
- Comparing Toyota’s full-size Crown trims: the XLE and Limited have the strongest combined rating in the 2024 lineup at 41 MPG; the Platinum is rated at 30 MPG.
For shopping comparisons, keep propulsion type, rating unit, trim, and classification consistent. A single ranking that blends an EV’s MPGe with a hybrid’s MPG obscures the difference in what each number measures.
Quick Recap
Best Value
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Rank #4
- An import form Aoshima
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