Some rides are known for their gas mileage, good or bad. When the average shopper purchases a vehicle, many will be looking for fuel efficiency. Some of the most fuel-inefficient vehicles are big trucks and SUVs with supercharged engines or high-end exotic cars. Here are the vehicles with the worst gas mileage for the 2026 model year. Supercars will be excluded from the rankings because they could take up the entire list on their own.A Detroit Free Press review in June of fueleconomy.gov was used to find mpg of these vehicles. BMW X5 M Competition and X6 M Competition – 13 city/18 highway/15 combined BMW X5 M and X6 MThe BMW X5 M and X6 M Competitions are some of the fastest SUVs money can buy. They also have comfortable interiors with many modern features that can be found in other BMW's. While these SUVs are great all around vehicles, they excel at everything but their gas mileage. Mercedes-Maybach GLS600 - 13 city/ 18 highway/15 combinedMercedes-Maybach GLS 600 at the Modded Detroit 2026 Season Opener Car Show on Saturday, April 11, 2026, in Commerce Township.The Mercedes-Maybach SUV is very expensive and comfortable. With reclining rear seats, headrest cushions and pillows that come with the vehicle, you will be too relaxed to worry about fuel costs.Mercedes-AMG G63 - 14 city/16 highway/15 combined Mercedes-AMG G63 in a Walmart parking lot in Dearborn on May 16, 2026.The Mercedes G-Wagon used to be the king of gas guzzling, but the new mild hybrid system in the G63 has raised its fuel economy from a combined 14 MPG to a whopping 15 a gallon. All gas-powered Rolls-Royce vehicles - 12 city/19 highway/14 combinedRolls-Royce Ghost Black BadgeAdvertisementAdvertisementRolls-Royce uses their BMW derived V12 engine in all of their gas-powered vehicles. The mpg may be terrible, but gas prices don't matter to those who have a chauffeur. Dodge Durango Hellcat – 12 city/17 highway/13 combined Liam Rappleye, an automotive reporter with the Detroit Free Press, drives a 2025 Dodge Durango SRT Hellcat in Detroit on Tuesday, June 24, 2025. The high-performance SUV features a supercharged 6.2-liter HEMI V8 engine that produces 710 horsepower.Another Hellcat powered vehicle is this Durango. It is the most powerful 7-seater money can buy.Cadillac Escalade V – 11 city/17 highway/13 combined Front ¾ view of the 2025 Cadillac Escalade-VThe Escalade is one of the most popular luxury SUVs and this one features a supercharged 6.2-liter engine. With the countless options this car can come with, good gas mileage is not one of them. Ferrari Purosangue – 11 city/15 highway/12 combined Ferrari PurosangueThe very first SUV released by Ferrari. The average customer of this Italian automaker may not pay attention to gas prices, especially those who drive cars with V12 engines. Ford Mustang GTD – 10 city/17 highway/12 combined Ford Motor Co. revealed the Mustang GTD Liquid Carbon version on Aug. 14, 2025. It goes on sale in October. The GTD starts at $325,000.AdvertisementAdvertisementWhile the rest of the mustang lineup gets much better mileage, the GTD is a road-legal racecar. Based on the GT3 racecar, the GTD is built for setting fast lap times, not for fuel efficiency.RAM 1500 TRX – 10 city/14 highway/12 combined RAM 1500 TRX at the Modded Detroit 2026 Season Opener Car Show on Saturday, April 11, 2026, in Commerce Township.The TRX is a 3-ton truck with a Hellcat engine, so the gas mileage is to be expected. If you need to tow with this truck, you can expect to see your gas mileage approach near single digits per gallon. Ford F150 Raptor R - 10 city/15 highway/12 combined2023 Ford F-150 Raptor RThe Raptor R is a pickup truck that gets worse gas mileage than the actual racecar that Ford offers. Supercharged V8-powered trucks are expensive to fill up but they are a blast to drive.Keenan Thompson is a car culture reporter for the Detroit Free Press. Contact Keenan at kthompson@freepress.com. Follow him on Instagram at @keenanautos. To sign up for our autos newsletter. Become a subscriber. AdvertisementAdvertisementThis article originally appeared on Detroit Free Press: These vehicles get the worst gas mileage in 2026
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