Ameer Randolph
MSR stoves are highly versatile and can be used with both liquid fuel and canister fuel. The type and amount of fuel required depend on various factors such as the number of people, the number of hot meals and drinks, environmental conditions, and the stove's efficiency. Liquid fuel options include white gas, kerosene, unleaded gasoline, and MSR's unique blend of refined white gas called SuperFuel. Canister fuel includes isobutane and MSR's IsoPro fuel. The amount of fuel needed can be estimated by considering the number of meals and hot drinks, with a baseline of 5.3 liters of hot water for three people over five days. The stove's efficiency, ambient temperature, wind, and other variables also impact fuel consumption.
| Characteristics | Values |
|---|---|
| Fuel Type | Liquid fuel or canister fuel |
| Liquid Fuel Options | White gas, kerosene, unleaded gasoline, MSR SuperFuel, MSR IsoPro fuel |
| Canister Fuel Options | Isobutane |
| Fuel Efficiency | Depends on the stove model and usage; the Reactor Stove System is more efficient than the PocketRocket stove |
| Fuel Consumption Calculation | Multiply the number of people by the number of hot meals and hot drinks; use the result to estimate the liters of water to be boiled and the corresponding fuel required |
| Fuel Consumption Monitoring | Visual inspection for liquid fuel; float test for canisters |
| Fuel Accessibility | Liquid fuel is more accessible and economical for long-term use, especially while traveling abroad |
| Fuel Container | Child-resistant cap available; non-child-resistant Expedition Fuel Cap sold separately |
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What You'll Learn
Liquid fuel stoves vs. canister fuel stoves
When it comes to choosing a stove for your outdoor adventures, there are a few factors to consider when deciding between a liquid fuel stove and a canister fuel stove. Both options have their own unique advantages and disadvantages, and the right choice for you will depend on your specific needs and preferences.
One important consideration is the type of trip you are planning. Liquid fuel stoves are typically better suited for long trips, winter conditions, and travel to remote areas where canisters may not be readily available. They are also a popular choice for emergency preparedness kits due to their durability and field maintainability. On the other hand, canister stoves are often lighter and more compact, making them ideal for short trips that require minimal cooking. The weight difference between a single fuel canister and a liquid fuel bottle is significant, but when multiple canisters are needed, the total weight can add up.
Another factor to consider is performance. Liquid fuel stoves, such as the MSR WhisperLite Universal, offer versatility and durability. They are known for their ability to burn a variety of liquid fuels, including white gas, kerosene, and unleaded gasoline. Additionally, liquid fuel stoves tend to perform better in cold conditions as canister stoves can be affected by low canister pressure in cold temperatures. However, canister stoves have improved over time, and newer designs offer increased efficiency, narrowing the performance gap.
Environmental impact is also an important consideration. Liquid fuel stoves are generally considered more environmentally friendly due to their reusable fuel bottles. While spent fuel canisters can be recycled, the process can be challenging as not all recycling programs accept them. Additionally, liquid fuel stoves allow you to monitor fuel consumption easily, and you can extend your fuel supply by using techniques like windscreens or heat exchangers.
Lastly, maintenance and repairability should be taken into account. Canister stoves are known for their low-maintenance operation and long-lasting reliability. However, if they fail, they often cannot be repaired in the field. Liquid fuel stoves, on the other hand, are renowned for their field maintainability and repairability, making them a reliable choice for extended trips or use in remote locations.
In summary, both liquid fuel and canister fuel stoves have their strengths and weaknesses. Liquid fuel stoves excel in terms of versatility, durability, and environmental friendliness, while canister stoves offer lightweight, compact convenience and improved performance in newer models. By carefully considering your specific needs and priorities, you can make an informed decision about which type of stove will best suit your outdoor adventures.
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The impact of environmental factors
The efficiency of a stove directly impacts how much fuel it will use. For instance, the Reactor Stove System boils a litre of water much faster and uses less fuel than the ultralight, minimalist PocketRocket stove. However, there are several environmental factors that can influence a stove's performance and, consequently, the amount of fuel it consumes.
Firstly, wind is the most common environmental factor that can severely impact a backpacking stove's performance. Windy conditions can blow away much of the heat generated by the stove. If you expect windy conditions, experts advise taking twice as much fuel as you would in perfect conditions, unless you are using a windscreen with your stove. A windscreen helps direct hot exhaust gases around the sides of the pot, preventing heat loss to the air and protecting from winds that blow heat away from the pot.
Secondly, the ambient temperature can affect fuel consumption. Low temperatures mean that water is likely to be colder and will take longer to boil, requiring more fuel. Similarly, the temperature of water can impact fuel usage. For instance, starting with near-freezing water in the backcountry will take several additional minutes to reach a boil, burning more fuel.
Thirdly, elevation influences fuel usage. As elevation increases, the boiling point of water lowers, meaning water boils faster at higher elevations. However, some foods absorb water more slowly at higher elevations, requiring longer cooking times and more fuel.
Other environmental factors that can impact fuel usage include melting snow, overboiling, inefficient lighting of the stove, and the number of people using the stove. It is important to consider these factors when planning a trip and calculating fuel needs to ensure you have enough fuel for your MSR stove.
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Fuel efficiency
The fuel efficiency of an MSR stove depends on a variety of factors, including the type of stove, the fuel used, the environmental conditions, and the number of people using the stove.
Type of Stove
The MSR WhisperLite Universal stove is known for its versatility, durability, and repairability. It can burn various liquid fuels, including white gas, kerosene, unleaded gasoline, and isobutane canisters. The original MSR WhisperLite stove is also fuel-efficient and offers similar features at a lower price point. The MSR Reactor stove is highly efficient, boiling water faster and consuming less fuel than the PocketRocket stove.
Fuel Used
MSR stoves offer a range of fuel options, including liquid fuel and canister fuel. Liquid fuel stoves, such as the MSR WhisperLite Universal, are generally more fuel-efficient, especially when used with white gas, also known as "Coleman fuel." White gas burns cleaner, evaporates at a lower temperature, and reduces residue and odour. MSR SuperFuel, a unique blend of white gas, is even more refined and burns cleaner, reducing maintenance. Kerosene is widely available, inexpensive, and compatible with the WhisperLite International stove, but it is dirtier, more challenging to light, and varies in quality across different regions. Isobutane canisters are convenient and can be used with the WhisperLite Universal stove, enhancing wind resistance.
Environmental Conditions
Environmental factors such as ambient temperature, wind, altitude, and the need to melt snow can significantly impact fuel efficiency. Using a windscreen with liquid fuel stoves increases efficiency by directing hot exhaust gases around the cookware, reducing heat loss to the air and protecting from wind.
Number of People
The number of people in a group directly affects fuel consumption. Calculating the number of hot meals and drinks required can help estimate the amount of fuel needed. For example, a group of two people on a five-day trip with mostly boil-and-dump meals and some cold lunches may require approximately one 22 oz MSR fuel bottle.
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How to calculate fuel requirements
The amount of fuel required for an MSR stove depends on several factors, including the type of stove, the number of people, the number of hot meals and drinks, environmental conditions, and stove efficiency. Here is a guide on how to calculate your fuel requirements:
Step 1: Determine the Number of People and Their Meal Preferences
Calculate the number of people in your group and the number of hot meals and drinks they will require. If some members prefer cold meals or drinks, you will need less fuel. For example, consider a five-day trip with three people who want a hot drink every morning. That would amount to approximately 5.3 litres of hot water (12 ounces x 5 days x 3 people).
Step 2: Estimate Total Water Requirements
In addition to hot drinks, consider the water needed for cooking meals. If a meal doesn't require boiled water, still count it as a litre, as the stove usage time is likely similar. For instance, if you need to boil water for cooking dinners for the same group of three people over five days, you would require an additional 15 litres of water (1 litre/person/day x 3 people x 5 days).
Step 3: Understand Your Stove's Efficiency
Different MSR stove models have varying efficiencies. For example, the Reactor Stove System boils a litre of water faster and uses less fuel than the PocketRocket stove. The type of fuel also matters; liquid fuel stoves may deliver better boiling times after the stove has been used, similar to how a car's engine performs once warmed up. Additionally, using a windscreen can increase efficiency by protecting the stove from wind and directing heat around the cookware.
Step 4: Calculate Fuel Requirements
Once you have estimated your total water requirements, you can use the stove's specifications to determine fuel needs. For example, the WhisperLite stove can boil about 7 litres of water per 100 grams of fuel, or 100 ml (3.5 fl oz) of fuel. So, for the previous example of 20 litres of water (5.3 litres for drinks and 15 litres for meals), you would need approximately 200 grams of fuel, or 200 ml (7 fl oz).
Step 5: Account for Environmental Conditions and Variables
Remember that ambient temperatures, wind, overboiling, inefficient lighting, altitude, melting snow for water, and other variables can affect fuel consumption. Always bring extra fuel until experience can guide you better. It is also wise to include some no-cook meals in your trip, just in case your fuel estimates are off or you encounter unforeseen circumstances.
In summary, calculating fuel requirements involves considering the number of people, their meal preferences, stove efficiency, and environmental conditions. By following these steps and referring to your specific stove's performance metrics, you can estimate the amount of fuel your MSR stove will need.
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Alternative fuel options
MSR stoves offer a choice between liquid fuel and canister fuel. The MSR WhisperLite Universal is one of the only stoves that can work with both isobutane canisters and liquid fuel. The stove comes with a canister fuel adapter, allowing it to be used with isobutane fuel canisters.
Liquid fuel stoves are a good option due to their cold-weather performance, low cost, environmental impact, and worldwide fuel availability. They are also easy to maintain and durable. Liquid fuel stoves can use white gas, which is the first choice for most people in North America. White gas burns cleaner, evaporates at a lower temperature, and doesn't leave residue or odour if spilled. MSR offers a unique blend of white gas called SuperFuel, which burns cleaner and is free of additives.
Other liquid fuel options include kerosene, unleaded auto gas, aviation gasoline ("avgas"), jet fuel, biodiesel, and pure plant oils. Kerosene is inexpensive and widely available, but it is dirty, smelly, and harder to light. The quality and performance of kerosene can vary depending on the region. Unleaded auto gas is cheap, widely available, and burns well but can be a little sooty.
Some alternative fuels like E85 (ethanol) and denatured alcohol can be used with MSR stoves, but they may require a different lighting technique and may not provide the optimal mix of fuel and air. Stoves that use alcohol are inexpensive, ultralight, and popular with thru-hikers.
Finally, some stove brands, including BioLite, Solo, and Vargo, offer stoves that are fuelled by wooden twigs, providing a unique alternative to traditional fuel options.
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Frequently asked questions
The amount of fuel used depends on the number of hot meals and drinks. For two people on a 5-day trip, one 22 oz MSR fuel bottle should be enough.
The Whisperlite International stove boils about 7 liters of water per 100g of fuel. 100g of fuel is roughly equivalent to 3.5 fl oz.
MSR stoves can use liquid fuel or canister fuel. Liquid fuel options include white gas, kerosene, unleaded gasoline, and MSR's unique blend, SuperFuel. Canister fuel options include isobutane canisters.
