RV Fuel Mileage: What Affects It and How to Improve 

Owning an RV lets you travel on your own terms. You can explore places very close to nature, and enjoy the comforts of your own home. But gas prices can quickly become a big part of your expenses. Larger RVs, in particular, can be very pricey regarding fuel. Knowing your RV fuel mileage is crucial for trip planning and saving expenses in this scenario. It also helps you to make effective decisions when it comes to RV purchase.

In this article, we will reveal the factors that affect RV mileage, suggest ways to maximize your fuel efficiency, and present a comparison between several mileage classes.

What Is Typical Mileage for an RV? 

RVs usually have less mileage compared to regular cars. Tiny camper vans can have a mileage of 18 to 22 MPG (miles per gallon). In contrast, bigger motorhomes can have a mileage of only 6 to 10 MPG.

Overweight RVs with powerful engines will certainly consume more fuel. But on the other hand, featherweight RVs are energy efficient.

The driving style is equally important. Smooth brakes with moderate speeds and shorter rest periods can increase the mileage. It is necessary to choose the route wisely. It can save you fuel if you go on a long trip.

RV Mileage Comparison by Type

Here is a breakdown of various RV types and their respective mileage: 

Class A RV Fuel Mileage  

Class A RVs are the biggest motorhomes with luxurious facilities. Their weight varies from 20,000 to 30,000 pounds. The majority of them have 6–10 MPG. These RVs offer space and luxury, but are less fuel-efficient due to size and weight. Diesel Class A RVs are better than gasoline ones in terms of efficiency.  

Class B RV Mileage  

A Class B RV is basically a compact van with a campsite in it. They are quite easy to handle and not very heavy. Mileage for them is usually in the range of 18–22 MPG. These vans are easier to drive, park, and maintain. For long distances, they are more fuel-friendly.  

Class C RV Mileage

Class C RVs represent the mid-size range of RVs that are bigger than a van but smaller than Class A. Their mileage is about 10-15 MPG. These RVs are unbeatable in terms of comfort. The reason is that Class C motorhomes are often built on a truck or a van chassis, which slightly improves their fuel economy.

RV Towing Fuel Mileage

When you tow a trailer, a fifth wheel, or a car behind your RV, it will be the same as losing a certain percentage of your fuel efficiency. Even a small trailer can still be responsible for 2-5 MP losses. Heavier trailers combined with large RVs can cut the mileage by 30-40%.

What Is the Most Fuel-efficient RV?

Class B RVs, also known as camper vans, are the clear winners regarding fuel efficiency.  How much their RV insurance is also has an influence in this case, which is lower ($500 to $1500) than some other RVs. These vehicles are much smaller and lighter, and are just as easy to drive as the big ones. 

Their engines do not have to work as hard as Class A ones. Typically, Class B RVs give about 20 to 25 miles per gallon. These vehicles are well-designed aerodynamically. It makes them preferred by the travelers who want to be comfortable yet efficient. 

Hybrid and electric camper vans are also gaining popularity. They promise lower fuel costs, but are pricey these days.

How to Calculate RV Mileage

Keeping track of your RV fuel consumption is very easy and straightforward. The simple formula mentioned below will do the task for you:

Mileage (MPG) = Total miles of travel ÷ Gallons of fuel used

Imagine you drove 200 miles and used 20 gallons of fuel. Then, the calculations would give you:

200 ÷ 20 = 10 MPG

Regular monitoring will undoubtedly enable you to detect problems, decide on fuel stops, and analyze the driving style. The mileage calculated over different trips can be used to explain the impact of different factors.

Fuel Electric Hybrid RV Mileage

Electric or hybrid RVs are still new but definitely promising. A full electric RV could cover a distance of 100–300 miles with one charge only. It is mainly dependent on the battery size. On the other hand, the hybrids have a gasoline or diesel engine combined with a battery, giving 15-25 MPG.

These types of RVs are perfect for city trips and shorter getaways. Long trips might need some planning due to the limited recharge services. Eventually, electric and hybrid RVs will be recognized as standard RVs as technology advances.

New vs Old RV Mileage

RVs that have just come out of the factory are usually better at conserving fuel than those that have been around for a while. The improvements in engine performance, reduction in weight of materials, and aerodynamic shape that cause less resistance to the wind result in a very low fuel consumption rate. 

On the other hand, the RVs of the past are more massive. For using older technology, they need extra maintenance. Getting new tires, engines, or gas systems can significantly affect your outdated vehicle’s fuel mileage. Regular servicing, for example, changing oil and air filters, keeps the old and new RVs running efficiently.

What Affects RV Mileage

The fuel efficiency of an RV is determined by not many factors, but all key factors are very important. It can be significantly affected by daily routines and maintenance decisions. The most important parameters are:

Weight

With the RV being heavy, the engine has to work even harder. Unnecessary weight caused by luggage, water, or gear reduces the engine’s efficiency. It leads to greater fuel consumption. Cleaning out your RV and taking only what is needed before a trip helps you travel lightly. Just a couple of hundred pounds can result in a noticeable difference in the mileage and engine performance over a long time.

Engine Type

Fuel consumption is also influenced by the type and size of the RV’s engine. Bigger engines are more fuel-consuming but provide more power for steep climbs. On the other hand, smaller engines are more economical. But they are suitable only for lighter cars. Picking an RV that suits your travel needs will sustain a good equilibrium between power and efficiency.

Driving Speed

Fuel consumption has a lot to do with speed. Driving at a high speed makes the RV use more fuel due to the increased air resistance. Going at a speed of between 55 and 65 mph usually generates the best mileage. Fuel economy can also be improved by smooth acceleration, gentle braking, and using cruise control on highways.

Tires

Tires have a greater impact on fuel consumption than you realize. A tire that is either under- or over-inflated results in uneven wear and higher rolling resistance. It makes the engine consume more fuel. Check the tire pressure before every trip and set it according to the manufacturer’s recommendation. Taking care of your tires will enhance your safety and improve your RV’s smooth running.

Aerodynamics

The design and setup of your RV significantly impact how easily it can travel through the air. Roof racks, cargo boxes, and any external equipment create drag. It forces the engine to burn more fuel. Keeping the roof clear and avoiding having large items outside is wise. A clean, aerodynamic RV is more efficient and gains better fuel economy.

Maintenance

An RV that is taken care of properly will always be the one that uses less fuel. Regular oil changes, a clean air filter, and spark plugs that are in good condition keep the engine running at peak efficiency. Neglecting minor maintenance can lead to the engine straining and consuming more power. Routine maintenance is the most effortless way to boost mileage.

Terrain

The fuel consumption is closely linked to the type of road you are driving on. Driving in hilly or rocky regions makes the engine work harder, particularly during upward movements and frequent stops. In contrast, flat highways allow smoother and more efficient driving. Planning your routes with less climbing terrain is better. It can help you save fuel over lengthy trips.

Weather

The weather has a big role in how much fuel your RV will use. Traveling against strong wind directions increases the drag. Heavy rains create extra resistance. Also, the engine and AC work harder when the temperatures are extremely hot or cold. Traveling in good weather and knowing RV storage ideas can help you make the most of your fuel. Checking forecasts before a trip helps you plan smarter.

Diesel vs Gas RV: Which Offers Better Mileage

Diesel RVs give the best fuel mileage results. Especially for travelers who drive long distances frequently or pull heavy trailers. Gas RVs are cheaper and have simpler mileage and maintenance. They are best for short or infrequent trips. Here is a side-by-side comparison:

How to Improve RV Mileage

Increasing the fuel mileage of your RV will lead to a more affordable and efficient trip every time. There are some simple methods to that effect:

1. Drive calmly and make sure not to impulsively brake or accelerate.
2. Make sure that your tires are properly working to ensure less rolling resistance.
3. Take off the unnecessary items and make the load lighter.
4. Get regular maintenance, such as oil changes and replacements for the air filter.
5. On the highways, you can use cruise control to keep a constant speed.
6. Choose routes that do not have heavy climbs and are less crowded with other vehicles.
7. Going around up to 55-65 mph can guarantee the best fuel efficiency.
8. Take off the roof racks or cover the external cargo can minimize drag when driving.

Conclusion 

RV fuel consumption or mileage is determined differently by the criteria of type of RV. Engine, weight, and driving habits also contribute. The different fuel consumption classes, from usual to least efficient, are Class B, hybrids, and Class A. 

However, regularly maintaining your vehicle, driving smartly, and managing weight properly can save you fuel and money. Knowing the mileage will make it easier to plan the trips and will facilitate a stress-free RV lifestyle.

Frequently Asked Questions

Can I improve mileage with maintenance?

Yes, regular oil changes, air filter cleaning, tire inflation, and engine tests will help in increasing fuel efficiency.

Can new RVs improve mileage?

Yes. Fuel efficiency is enhanced in new RVs with different engines, lightweight parts, and technology.

Can using air conditioning reduce fuel mileage?

It can. Operating an A/C reduces fuel economy by up to 10 percent, particularly during city driving or when idling.

Do hybrid RVs save fuel?

Sure, it can. Hybrids and electric RVs save fuel on busy roads and shorter trips.