Many drivers prioritize affordability and style, yet overlook how sharply a vehicle can impact their fuel budget. Below is a focused look at the worst cars for gas mileage, highlighting models that consistently demand more frequent stops at the pump.
Understanding real world fuel performance helps buyers avoid costly surprises, especially when combined with routine maintenance and route planning. The comparison snapshot that follows captures key efficiency and cost indicators for a selection of notably thirsty vehicles.
| Model Year | Vehicle | City MPG | Highway MPG | Annual Fuel Cost |
|---|---|---|---|---|
| 2020 | Chevrolet Suburban 6.2L V8 | 14 | 20 | $3,850 |
| 2021 | Ram 2500 6.4L V8 | 14 | 21 | $3,750 |
| 2019 | Lexus LX 570 | 15 | 19 | $3,700 |
| 2022 | GMC Yukon XL 6.2L V8 | 14 | 20 | $3,900 |
| 2018 | Ford Expedition 6.2L V8 | 14 | 21 | $3,600 |
Heavy Trucks and Large SUVs Fuel Efficiency
Full size trucks and large SUVs often top the list of worst cars for gas mileage because their sheer weight and powerful engines require significantly more fuel. Models such as the Chevrolet Suburban, Ram 2500, and Ford Expedition prioritize towing and space over efficiency, leading to city figures in the low teens and highway numbers that barely climb above twenty.
When these vehicles are used for everyday commuting instead of occasional hauling, the fuel costs add up quickly. Drivers who do not regularly review route planning and tire pressure can see their gas mileage drop even further, making inefficient driving patterns more expensive over time.
Luxury Performance Models and Their Thirst
Luxury performance cars combine powerful engines with premium fuel requirements, driving up both running costs and environmental impact. Models such as the Lexus LX and BMW M Series often deliver single digit city MPG even with advanced engineering, translating to higher annual fuel expenses compared to mainstream alternatives.
While these vehicles offer refined handling and strong acceleration, the tradeoff is a consistently low fuel efficiency that can make road trips and daily drives noticeably more expensive at the pump.
Older Platforms and Inefficient Powertrains
Older platform designs and naturally aspirated V8 engines remain common in vehicles that rank among the worst cars for gas mileage. Without modern direct injection, cylinder deactivation, or advanced transmissions, these powertrains burn more fuel per mile, especially during stop and go traffic.
Drivers holding onto legacy models for extended periods may find that upgrading to newer technology, even in the used market, can substantially reduce fuel spending over the life of the vehicle.
Evaluate Driving Patterns and Costs
Understanding how different driving habits affect gas mileage helps consumers decide whether a large vehicle fits their lifestyle. Frequent highway miles may cushion the blow slightly, but urban congestion dramatically exposes inefficient models, making fuel budgeting a critical factor before purchase.
Key Takeaways for Fuel Conscious Buyers
- Large SUVs and full size trucks are frequently the worst cars for gas mileage due to weight and engine displacement.
- Annual fuel costs can differ by thousands of dollars when comparing efficient midsize vehicles to the thirstiest options.
- Driving patterns, maintenance routines, and route planning significantly impact real world fuel efficiency.
- Evaluating hybrid or alternative fuel options, when available, can offset some of the inherent inefficiency in larger vehicles.
- Reviewing specifications, including city highway MPG and fuel type requirements, helps avoid unexpected running costs.
FAQ
Reader questions
Which large SUV has the worst gas mileage in most real world tests?
The Chevrolet Suburban with the 6.2L V8 consistently records very low city MPG, often in the mid teens, making it one of the least efficient large SUVs in everyday use.
Do diesel options in full size trucks always improve fuel efficiency compared to gasoline versions?
While diesel engines can offer better highway efficiency, the difference may not offset higher fuel prices and upfront costs, especially for drivers who primarily commute in stop and go traffic.
How much can aggressive driving lower MPG for these thirsty vehicles?
Hard acceleration and high speed driving can reduce gas mileage by hundreds of dollars annually, particularly with heavy trucks that already consume substantial fuel.
Are hybrid variants available for any of the models listed as worst cars for gas mileage?
Hybrid versions remain limited among the largest SUVs and trucks, and when they do exist they often target niche markets rather than addressing the core inefficiency of the platform.