
Whether you should use diesel fuel on your heater depends on the type of heater you have. Kerosene heaters, for example, can operate with diesel fuel, but only in temperatures below 30° F, and winterized diesel additives are needed to keep the diesel's viscosity. Kerosene forced-air heaters can run on multiple fuels, including #1 diesel oil, but additional ventilation is required to disperse added contaminants produced by the additives in diesel fuel. Diesel fuel can also be used in oil furnaces, but only in small amounts, and it is more expensive than heating oil.
Characteristics and Values Table
| Characteristics | Values |
|---|---|
| Diesel as a substitute for kerosene | Yes, diesel can be used as a substitute for kerosene in kerosene heaters, but it is not recommended for prolonged use due to the risk of increased soot and maintenance issues. |
| Diesel fuel type | #1 diesel with 91% isopropyl alcohol or winterized diesel with additives for temperatures below 30° F are recommended. |
| Ventilation | Adequate ventilation is required when using diesel fuel due to the production of added contaminants. |
| Maintenance | Using diesel fuel may require additional maintenance to address the buildup of soot and other impurities. |
| Cost | Diesel fuel is typically more expensive than heating oil due to taxation and the need for multiple trips to the gas station to fill up a standard oil tank. |
| Safety | Proper safety measures and precautions must be followed when using diesel fuel to avoid accidents and potential damage to the furnace or heater. |
| Storage | Diesel fuel can be stored for up to six months before it degrades; using clean containers is essential to prevent contaminants from damaging the furnace or heater. |
| Availability | Diesel fuel is readily available at local gas stations, making it a convenient option in emergencies when heating oil is unavailable. |
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What You'll Learn
- Kerosene heaters can operate with diesel fuel, but only in temperatures below 30° F
- Diesel #1 can be used as a substitute for kerosene, but it requires an additive like isopropyl alcohol
- Diesel fuel is more expensive than heating oil
- Diesel fuel can be used in an emergency to heat your home
- Diesel fuel can produce more soot than heating oil, so ensure proper ventilation

Kerosene heaters can operate with diesel fuel, but only in temperatures below 30° F
Kerosene heaters can operate with diesel fuel, but it is not recommended to do so for extended periods. Diesel fuel is primarily intended for vehicles and is more expensive than kerosene due to the way it is taxed. It is also more expensive because most oil tanks hold approximately 225 gallons of fuel, requiring multiple trips to the gas station to obtain enough diesel to fill up the tank.
In an emergency, diesel fuel can be used as a substitute for kerosene in temperatures below 30° F. However, it is important to note that diesel fuel burns dirtier than kerosene, leading to increased soot buildup and more frequent maintenance. Prolonged use of diesel fuel can also cause wear and tear on the heater. Therefore, it is advised to return to using kerosene as soon as possible.
Additionally, diesel fuel produces more contaminants, requiring extra ventilation to disperse them. It is also crucial to use clean containers for diesel fuel as contaminants can damage the heater. Before adding diesel fuel to a kerosene heater, ensure that the heater is turned off to prevent any accidents.
It is worth noting that diesel fuel can be safely stored for up to six months before it degrades. However, it is not advised to store diesel for prolonged periods as additives have limitations and require specific treatments.
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Diesel #1 can be used as a substitute for kerosene, but it requires an additive like isopropyl alcohol
Kerosene, also known as #1 diesel fuel oil, is a lighter diesel oil than #2 diesel. It has a lower boiling point than #2 diesel and is typically used in a variety of engine systems. On the other hand, #2 diesel is almost exclusively used for vehicles. Kerosene burns at a lower temperature than #2 diesel, which can be beneficial in freezing temperatures as it doesn't gel as quickly. However, this also makes it less fuel-efficient and reduces engine power. Kerosene also has a lower energy value, containing about 135,000 BTU per gallon compared to 139,000 BTU for a gallon of #2 diesel.
Due to the rising price of diesel fuel, some people may consider using kerosene in their diesel engines or vehicles. Kerosene is typically cheaper than diesel and can be useful in preventing gelling in freezing temperatures. However, there are several risks associated with using kerosene in a diesel engine. Kerosene burns drier and has less lubricity than #2 diesel, which can potentially damage fuel pumps and injector pumps. Additionally, using kerosene as fuel on public roads is prohibited in some countries like Canada and the United States.
Similarly, when considering using diesel fuel in a kerosene heater, there are some important points to consider. Firstly, diesel fuel can generally be used safely in kerosene heaters as an alternative to kerosene. However, to ensure an even burn and proper functionality, an additive such as 91% isopropyl alcohol should be mixed with the diesel. Approximately 5 ml of isopropyl alcohol should be added to every pint of diesel, and the mixture should be stirred vigorously for about a minute before use.
It is worth noting that using diesel fuel without proper mixing with the additive can lead to issues with certain types of kerosene heaters, particularly torpedo heaters. These heaters may be more prone to clogging and may require extra maintenance if diesel is not properly mixed with isopropyl alcohol. Additionally, diesel fuel may result in a stronger odour compared to kerosene. Overall, while diesel fuel with the appropriate additive can be a viable substitute for kerosene in heaters, it is important to exercise caution and follow the recommended mixing procedures to ensure optimal performance and minimize potential issues.
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Diesel fuel is more expensive than heating oil
While diesel fuel can be used as a substitute for heating oil in emergencies, it is not recommended for long-term use. Diesel fuel is typically more expensive than heating oil due to several factors, including taxation and supply and demand.
Tax regulations differentiate the uses and taxation of heating oil and diesel fuel. Heating oil, considered an essential fuel for residential and commercial heating systems, is untaxed. On the other hand, diesel fuel has a road tax levied on it, making it more expensive. Additionally, the red dye added to heating oil for tax differentiation makes it unsuitable and untaxed for on-road applications.
The demand for heating oil increases during the winter or in cold weather, causing heating oil costs to rise. In contrast, diesel fuel is primarily used for construction machinery, agricultural vehicles, and off-road vehicles, and its price can be higher during seasons with lower demand for heating oil.
The interchangeability of diesel and heating oil is often governed by local regulations and may require equipment adjustments to ensure compatibility and safety. While diesel fuel can be a temporary solution in emergencies, it is not a long-term substitute for heating oil due to the differences in their specific additives and considerations.
It is important to note that using diesel fuel in a heating oil system may require additional ventilation due to the additives in diesel fuel, which produce added contaminants. Additionally, the extra heat generated by diesel fuel can lead to increased wear and tear on furnace components. Therefore, while diesel fuel may be a short-term option, it is essential to understand the differences and potential impacts on your heating system.
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Diesel fuel can be used in an emergency to heat your home
If you need to use diesel fuel for your heater, there are some important steps to follow. Firstly, turn off your heater and locate the fill pipe, which is where you will add the diesel fuel. Use a clean container to pour the diesel into, and then carefully add it to your fill pipe. Once you have added the diesel, turn your heater back on and check that it is functioning properly. It is important to ensure your heating system is well-ventilated, as diesel fuel can produce more soot than heating oil.
Additionally, it is crucial to only use approved containers for diesel fuel. Diesel uses yellow gas cans, which should be labelled appropriately to distinguish them from other fuels. It is also worth noting that diesel fuel can be safely stored for up to six months before it degrades. If you will not be using diesel for other purposes, it should be properly disposed of through hazardous waste collection or recycling centres.
While diesel fuel can be a quick fix in an emergency, using it for extended periods can lead to increased soot buildup and more frequent maintenance. Prolonged use of diesel fuel can also cause wear and tear on your heater, so it is important to transition back to regular heating oil as soon as possible.
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Diesel fuel can produce more soot than heating oil, so ensure proper ventilation
If you're considering using diesel fuel in your heater, there are several factors to take into account. Firstly, understand your emergency heating requirements. In colder regions, running out of fuel in your heating oil tank during winter can be a serious concern. In such cases, diesel fuel can be a viable short-term alternative to keep your home warm.
Diesel fuel and heating oil are chemically similar, but diesel is slightly more refined and tends to produce more soot than heating oil. This means that when using diesel fuel, it is crucial to ensure proper ventilation in your heating system to disperse the added contaminants produced. Additionally, diesel fuel typically costs more than heating oil due to differences in taxation, making it a less economical long-term solution.
If you decide to use diesel fuel in your heater, follow these safety guidelines:
- Turn off your heater before adding any fuel to prevent accidents.
- Use clean containers to avoid contaminants that can damage your heater.
- Locate the fill pipe, which is where you will add the diesel fuel.
- Carefully pour the diesel fuel into the fill pipe.
- Turn the heater back on and check for proper operation.
- Ensure your heating system is well-ventilated to manage the increased soot production associated with diesel fuel.
While diesel fuel can be a convenient substitute in emergencies, it is important to return to regular heating oil as soon as possible due to the increased soot, maintenance requirements, and higher costs associated with diesel fuel.
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Frequently asked questions
Yes, Master's kerosene forced-air heaters can run on multiple fuels, including #1 and #2 diesel oil.
Diesel fuel is typically more expensive than heating oil, and it burns dirtier, leading to increased soot buildup and more frequent maintenance.
Ensure that your heater is turned off before adding diesel fuel. Use clean containers to avoid contaminants, which can damage your heater. Additional ventilation will also be required to disperse the added contaminants produced by diesel fuel.
No, diesel fuel is intended to be used as a temporary solution. It can be safely stored for up to six months before it degrades. Using diesel fuel for extended periods may cause damage to your heater.
Kerosene heaters are known to be illegal in some regions, such as Massachusetts. Check your local laws before using diesel fuel in your master heater.










































