Fuel economy labels tell an honest story about what a vehicle asks of its owner, and a handful of new SUVs and trucks tell the harshest one. Supercharged V8s, twelve-cylinder engines and heavy, boxy bodies push their EPA ratings into the low teens. Here are twelve of the thirstiest models on sale now, ranked from the lowest combined mpg upward.
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1. Ferrari Purosangue: Thirstiest Of The Lot
The 2026 Ferrari Purosangue carries an EPA rating of 11 mpg in the city, 15 mpg on the highway and 12 mpg combined, which makes it the thirstiest SUV in SlashGear’s 2026 roundup. The figure applies to the model’s single powertrain, a naturally aspirated V12, so no gentler variant exists to soften the number.
Buyers at this price are unlikely to be shopping on running costs, yet the arithmetic still matters. A 12 mpg combined rating means a long weekend drive can empty the tank surprisingly fast, and fuel stops become a regular part of any road trip.
2. Ford F-150 Raptor R: Supercharged And Starving
Ford’s supercharged F-150 Raptor R in 4WD form returns just 12 mpg combined, according to the mpgbuddy entry for the Raptor R drawn from the EPA fuel economy dataset for 2026. That ties it with the Ferrari Purosangue at the top of the list, an odd pairing for a pickup built for desert running.
The result follows from pairing a high-output supercharged V8 with big off-road tires and a heavy truck body. Owners who tow or drive hard in the dirt should expect real-world numbers close to the label, and a premium-fuel habit to go with it.
3. Cadillac Escalade-V: Luxury Barge With A Big Thirst
The 2026 Cadillac Escalade-V is rated at 11 mpg in the city, 17 mpg on the highway and 13 mpg combined, a set of numbers SlashGear’s tally of thirsty SUVs lists among the worst of the year. Only the city figure matches the Purosangue’s, but the combined result is close behind.
A full-size, three-row SUV with a supercharged V8 was never going to sip fuel, and the Escalade-V does not pretend otherwise. Families who want the space can find the same body with a more modest engine, while the V buys speed at a steady cost at the pump.
4. Dodge Durango SRT Hellcat: Hellcat Power, Hellcat Habits
The 2026 Dodge Durango SRT Hellcat is rated 12 mpg in the city, 17 mpg on the highway and 13 mpg combined in the figures SlashGear compiled gathered. Supercharged Hellcat power in a three-row family SUV carries a predictable price at the pump.
Its combined number matches the Escalade-V, yet the Durango remains one of the few mainstream SUVs that can pair seating for several passengers with that much muscle. Shoppers drawn to it should budget for frequent fill-ups, since city driving, at 12 mpg, is where the Hellcat is least forgiving.
5. Jeep Wrangler Rubicon 392: Hemi Power Off The Pavement
With the 392 Hemi V8 under the hood, the Jeep Wrangler Rubicon is rated 13 mpg in the city, 17 mpg on the highway and 14 mpg combined, per SlashGear’s 2026 list. That is a steep drop from the efficiency expected of a compact-sized off-roader.
The V8 turns a rugged trail machine into a muscle-car-style SUV, and the fuel economy shows the trade. Buyers who care about range on long trips should note that 14 mpg combined leaves little cushion, while the standard engines in the same body cost far less to feed.
6. BMW XM Label: Plug-In, Still Thirsty
The plug-in hybrid BMW XM Label still rates only 14 mpg combined on gasoline in the 2026 EPA data, as shown in least-fuel-efficient ranking from mpgbuddy. The figure counts gasoline operation alone, so the battery does not rescue the number once its charge is spent.
The XM pairs a twin-turbo V8 with an electric motor to chase performance rather than frugality. Owners who plug in regularly and keep trips short can lean on electric range, but anyone driving long distances will see the V8 do most of the work at a heavy fuel cost.
7. Rolls-Royce Cullinan: Twin-Turbo V12 Royalty
The Rolls-Royce Cullinan, powered by a twin-turbo V12, is rated 14 mpg combined for 2026, according to EPA-based mpgbuddy ranking. It is one of the few vehicles on the list built around such a large engine for the sake of silence rather than speed.
Smooth, effortless torque is the point of the V12 in a Rolls-Royce, and efficiency was never part of the brief. Buyers in this segment tend to accept the cost without complaint, though a 14 mpg combined rating still means more fuel stops than a typical luxury SUV demands.
8. Mercedes-AMG G 63: Mild Hybrid, Same Appetite
The Mercedes-AMG G 63 is rated 15 mpg combined for 2026, unchanged by its mild-hybrid system, as mpgbuddy’s least-efficient list records. The small electric assist adds a little low-speed help but leaves the headline number where it was.
A boxy body with the aerodynamics of a wardrobe and a twin-turbo V8 behind the grille explains most of the result. Buyers drawn to the G-Wagen’s presence should not expect the hybrid badge to change the fuel bill, since the label shows no real improvement.
9. Ram 1500 RHO: Pickup With A Hefty Number
The Ram 1500 RHO 4WD is rated 15 mpg combined for 2026, a result placed on the 2026 list by mpgbuddy’s EPA-derived ranking. That makes the performance-minded full-size pickup one of the thirstiest trucks currently on sale.
Ram aimed the RHO at desert-running buyers who want speed and capability in the same truck, and a 15 mpg combined rating is part of the cost. Anyone planning daily commutes in it should price fuel carefully, because the ordinary 1500 trims offer far better economy.
10. Jeep Grand Wagoneer: Three-Row Luxury At 15 Mpg
Jalopnik’s EPA-based tally of the thirstiest new vehicles puts the Jeep Grand Wagoneer 4WD at 15 mpg combined, according to Jalopnik’s thirstiest-vehicles slide. That tally covers the 2024 model year, with a powertrain that carries over into later years.
A flagship SUV this large, with a big V8 and a heavy frame, lands where the physics predict. Families attracted to the third-row space and towing capacity should treat 15 mpg combined as a realistic baseline, and long road trips will need plenty of fuel planning.
11. Ford F-150 Raptor: The Standard Raptor Still Drinks
The standard twin-turbo V6 F-150 Raptor 4WD is rated 16 mpg combined for 2026, according to the mpgbuddy 4WD Raptor listing. It trails the Raptor R by four mpg, which is the difference a smaller, less extreme engine makes.
That gap is the most useful comparison on the list. Buyers who want the Raptor’s suspension and off-road look can pick the V6 and save a noticeable amount at the pump, though 16 mpg combined remains well below what a conventional half-ton pickup delivers.
12. Ford Ranger Raptor: Midsize Truck, Big Appetite
Even the midsize Ranger Raptor 4WD manages only 17 mpg combined for 2026, per the mpgbuddy Ranger Raptor page. That figure closes out the list, and it shows that a smaller body does not guarantee efficiency once a performance drivetrain is added.
The Ranger Raptor trades economy for wide-track suspension and aggressive tires, and the EPA label reflects it. Buyers who want a compact footprint can enjoy the capability, though they should know a regular midsize pickup uses noticeably less fuel for everyday errands.
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