How far can an RV go on a tank of gas? (9+ tips to save gas)

In this article, we will answer the following question: How far can an RV go on a tank of gas? We will also give you a few tips on how to save gas on long RV trips and how to optimise your vehicle so it doesn’t consume so much fuel. 

How far can an RV go on a tank of gas?

How far an RV can go on a tank of gas will depend on the RV class and the gas tank size. Please see the table below for more details:

RV average fuel consumption

RV ClassGas Tank SizeHow far you can go on a tank of gas
Class A80 to 150 Gallons560 to 1,950 Miles
Class B25 Gallons450 to 625 Miles
Class C24 to 55 Gallons336 to 990 Miles

How can I save gas on my RV trip?

Of course, you can save gas on your RV trip and extend the above miles limit, just by following a few simple tips: 

  1. Travel light – By reducing the weight of your RV to a minimum, you could save money at the pump. For example, 100 pounds of additional baggage could represent a 2% fuel increase. 
  1.  Add a baffle – In this way, your vehicle’s engine will “strain” less and at the same time consume less fuel. Finally, this deflector could protect your vehicle from small stones and other debris that you will come across on the road!
  1.  Drive responsibly –  By limiting acceleration-braking (as much as possible), by maintaining a constant speed and by respecting the speed limits, you could achieve great fuel savings, while adopting a safer driving style!
  1. Monitor the tire pressure – If your tires aren’t inflated enough, even just a few pounds, you could lose a lot at the pump; make sure you have the correct tyre pressure for optimum fuel economy; your wallet will thank you!
  1. Properly maintain your RV – The link between maintaining your RV and reducing your fuel consumption may not be visible at first glance, but a vehicle in optimal condition will allow you to achieve superior fuel efficiency!

What to do if my RV over-consumes gas?

If your RV over-consumes gas, you must first find the cause and then try to fix it. Here are the most common issues and recommended optimisations in order to save gas:

  1. An insufficiently maintained engine – For optimal operation of your engine, it is essential to have good carburetion. Carburetion is the mixture of air and gasoline during engine operation. 

If it’s bad (too much air, not enough gasoline, or too much gasoline and not enough air), your RV is running poorly, consuming more and polluting more. It is therefore important that the carburetion is optimal, and it is also directly linked to the quality of the air received.

In the event of imperfect carburetion, you will have to take your RV to the garage, so that an injection adjustment is carried out, or work on the air/fuel ratio applied to the engine. 

  1. An old, dirty air filter – An engine draws fresh air from the outside, and the air filter helps trap dirt and dust from the air, providing the purest air possible for your engine. The most common filters are paper and should be changed when servicing your car.

If it is not changed on time or is too old, your air filter will clog and allow particles to pass into the engine. Combustion will thus be poor, performance reduced, and consumption will increase. A new air filter costs less than $15 and will allow you to get quality filtration!

  1. Unsuitable or poor quality engine oil – Your engine runs on oil, which constantly lubricates the engine so it doesn’t get damaged and runs smoothly. But with old or unsuitable oil for your engine, apart from the risk of parts breaking, your actual consumption could well skyrocket.

It is important to check that your oil corresponds to the manufacturer’s recommendations, available in your maintenance book. The right oil, with the right viscosity, will protect your engine mile after mile.

  1. The air conditioning: it works thanks to a compressor driven by a belt, which takes its force from the engine. When you turn on the air conditioning, you increase the effort required of the engine. This results in consumption that can rise by more than 10%.
  1. Electrical accessories: all electrical accessories, if they create significant consumption, can indirectly impact the consumption of your RV. (heated seats, heated windshield or rear window, sound system, GPS, additional lights, etc.)
  1. Transport accessories (roof racks, roof rack, bicycle rack): all the accessories allowing to increase the transport capacities of your RV will increase your fuel consumption. 
  1. Driving with the windows open at high speed: Windows open on the national road generate overconsumption at least equal to air conditioning. Good to know!
  1.  Using the wrong tires and not paying attention to them – For example, if you use winter tires or off-road tires in the middle of summer, they will tend to wear out faster and increase fuel consumption, because their rubber is softer. To avoid the risk of overconsumption, it is necessary to check the tire pressure on a regular basis. Check them about every three weeks!
  1. Incorrectly adjusted brakes  – When your brakes are poorly maintained or have not been checked for a while, there is a risk that one or more of them will break constantly, even if you are not braking. Even though it is sometimes imperceptible, it does have an impact on consumption. This could come from the adjustment of the brake calliper, the brake pads, the condition of the disc or the brake system itself.


As you could read in this article, the fuel consumption of your RV will largely depend on the class of RV, gas tank capacity, but also on your driving style and how well you maintain your vehicle!

Do you have any tips on saving RV gas on long trips? Let us know!

FAQ on How far can an RV go on a tank of gas?

How to regulate RV gasoline consumption?

To regulate RV gasoline consumption: 

  • Avoid accelerating the accelerator. 
  • Avoid climbing too high in the towers.
  • Anticipate traffic. 
  • Stop the engine. 
  • Shift gears quickly. 
  • Shift down rather than brake. 
  • Avoid leaving the air conditioning always on.
  • Use cruise control.

How to save fuel on a descent?

To consume less fuel on a descent, slow down on the way up and let go of the throttle completely on the way down. Maintaining cruising speed when the road climbs requires extra fuel. And all the more so as the road is steep.

What speed to consume less?

Driving a little slower, for example, 120 instead of 130 km h on the motorway, allows you to consume much less. Thus, with a reduction in speed of 10 km / h, the economy rises to 1 litre of fuel on a journey of 100 km.


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