Introduction
Finding the class B RV with the best gas mileage is one of the smartest ways to extend your adventures without extending fuel stops. For vanlifers, travelers, and DIY-minded explorers, fuel efficiency means more time on the road and less impact on the places you love. At The Vansmith in Boulder, Colorado, we care deeply about thoughtful design, sustainable choices, and vans that roam further with purpose.
Top Performers and Class B RV Types
Not all Class B RVs are created equal when it comes to efficiency. Size, engine type, and layout all matter. Below are the standout options for drivers searching for the class b rv with best gas mileage, broken down by platform and real-world performance.
The Fuel Efficiency Champion: Diesel Sprinter Vans
Diesel Sprinter vans consistently lead the pack. They are known for long highway range and strong torque at lower RPMs.
Average MPG
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18–22 mpg on highways
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16–18 mpg combined
Top Models
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Mercedes-Benz Sprinter 2500 High Roof
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Sprinter-based touring vans with streamlined layouts
Diesel Sprinters shine for long-distance travel. Their efficiency pairs well with innovative layouts that balance comfort and function. This reflects our belief that innovative designs bring comfort to your journey, even far from paved roads.
Mini-T Campervan (Ford Transit Connect)
If compact travel is your goal, this platform delivers impressive numbers.
Average MPG
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22–25 mpg combined
Top Models
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Ford Transit Connect Mini-T Campervan
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Compact touring vans with lightweight interiors
These vans are easy to drive and park. They work well for solo travelers or couples who value simplicity. Less weight means less fuel use, which supports responsible travel and sustainability.
Winnebago Travato (Ram ProMaster)
The Travato is a popular choice thanks to its efficient gas engine and smart interior flow.
Average MPG
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18–21 mpg combined
Top Models
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Winnebago Travato 59G
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Winnebago Travato 59K
Front-wheel drive helps reduce drivetrain loss. The low floor also keeps weight centered, improving mileage. Many travelers consider this model when researching the class b rv with the best gas mileage that still feels spacious.
Ford Transit-Based Class B RVs
Ford Transit platforms strike a strong balance between power and efficiency.
Average MPG
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16–20 mpg combined
Top Models
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Ford Transit AWD touring vans
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Transit-based adventure vans with moderate roof height
EcoBoost engines and modern transmissions help these vans perform well in mixed driving. Their versatility suits mountain passes, desert highways, and coastal roads alike.
Ram ProMaster-Based Class B RVs
ProMaster vans remain a solid choice for fuel-conscious travelers.
Average MPG
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17–21 mpg combined
Top Models
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Touring vans on the ProMaster 1500 or 2500 chassis
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Compact ProMaster layouts focused on efficiency
Front-wheel drive improves traction while keeping fuel use reasonable. These vans are often lighter than rear-wheel-drive options, which helps mileage.
Diesel Class B RV Options
Diesel engines still hold an edge for long-range efficiency.
Average MPG
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18–22 mpg
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Sometimes higher on steady highway routes
Top Models
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Diesel Sprinter touring vans
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European-inspired diesel Class B layouts
Diesel options last longer and sip fuel at cruising speeds. That durability aligns with our value of unmatched craftsmanship, built to roam further, where every detail is meant to handle years of travel.
Factors Influencing MPG in Class B RVs
Fuel economy depends on more than the badge on the hood. Understanding these factors helps you choose wisely.
Chassis
Different platforms deliver power in different ways. Front-wheel drive and modern transmissions often improve efficiency, especially in stop-and-go driving.
Vehicle Size and Weight
Shorter wheelbases, lower roofs, and lighter materials reduce drag and fuel use. Thoughtful layouts matter more than sheer size.
Driving Habits
Smooth acceleration, steady speeds, and proper tire pressure can improve mileage by 10–15 percent. Even the class b rv with best gas mileage benefits from mindful driving.
General MPG Range for Class B RVs
Most Class B RVs fall into a realistic range:
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15–18 mpg: Larger gas-powered vans
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18–21 mpg: Efficient gas or lighter layouts
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20–25 mpg: Compact or diesel-focused options
While numbers vary, Class B RVs remain the most fuel-efficient motorized RV category. They offer freedom without the fuel demands of larger rigs.
Why Fuel Efficiency Fits the Vansmith Philosophy
At The Vansmith, we believe vans should support how you travel. Efficient platforms pair naturally with sustainable materials and energy-smart systems. That approach reflects our commitment to sustainability in every van, allowing you to explore responsibly while staying comfortable.
Our Colorado roots mean we test ideas on real roads, from alpine passes to desert highways. We focus on proven layouts, durable craftsmanship, and personalized support, so your van feels right from day one and years down the road.
Final Thoughts
Choosing the class b rv with best gas mileage is about more than saving money at the pump. It is about traveling farther, lighter, and with intention. Whether you prefer a diesel Sprinter, a compact Transit Connect, or a balanced ProMaster, the right choice opens the door to longer journeys and deeper experiences.
