Sylvie Willis
Winter diesel fuel, also known as winter blend diesel, is a type of diesel fuel that is enhanced to prevent it from gelling in cold weather conditions. It is typically used when the temperature drops below -7°C. Winter diesel fuel is created by blending No.1 diesel (which has a lower cloud point) with No.2 diesel fuel. The cloud point refers to the temperature at which the diesel fuel begins to develop solid wax particles, giving it a cloudy appearance. These wax particles can clog fuel filters and cause engine damage. By blending the two types of diesel, the winter blend diesel has a lower cloud point, preventing gelling in cold temperatures. The use of additives can also help improve the cold resistance of diesel fuel.
| Characteristics | Values |
|---|---|
| Purpose | To prevent diesel from gelling in cold weather conditions |
| Other names | Winter diesel, alpine diesel, winterised diesel |
| How it works | By treatment with additives that change the low-temperature characteristics of the fuel |
| Additive treatment | Cheaper than blending |
| Additive application | Must be fully mixed to guarantee a regulated blend; any secondary treatment must be pre-diluted and free-flowing |
| Cold filter plugging point (CFPP) | A test that indicates the rate at which diesel fuel will flow through a standardized filtration device in a specified length of time when cooled under certain conditions |
| Cloud point | The temperature at which the fuel begins to develop solid wax particles, giving it a cloudy appearance |
| Wax crystals | Can clog fuel filters and injectors in engines, leading to engine failure |
| No. 2 diesel fuel | Also called "summer" diesel fuel; can be used in warmer months |
| No. 1 diesel fuel | The main component is kerosene; it does not contain paraffin |
| Winter blend | A mix of No. 1 and No. 2 diesel fuel; the ratio can vary depending on the region, generally about 20:80 |
| Availability | Most gas stations offer winter blend diesel in cold weather conditions |
| Energy content | Lower than that of summer-grade diesel |
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What You'll Learn
- Winter blend diesel fuel is a mix of grade No.1 and No.2 fuel
- No.1 fuel is also known as kerosene and doesn't contain paraffin
- The blend ratio of No.1 to No.2 diesel fuels in the winter blend varies depending on the region
- Additives are used to improve the cold flow properties of diesel
- The cold filter plugging point (CFPP) is a standardised test that indicates the rate at which diesel fuel will flow through a filtration device when cooled
Winter blend diesel fuel is a mix of grade No.1 and No.2 fuel
The cloud point is the temperature at which the fuel begins to develop solid wax particles, giving it a cloudy appearance. The cloud point for No.2 diesel is about 14 degrees Fahrenheit, while the cloud point for No.1 diesel is -40 degrees Fahrenheit. By blending these two types of fuel, the cloud point and pour point of the mixture are lowered, preventing gelling in cold temperatures.
The ratio of No.1 to No.2 diesel fuels in the winter blend can vary depending on the region. In colder regions, a higher percentage of No.1 diesel may be required, while in warmer regions, a lower percentage may be used. Generally, the ratio is about 20% No.1 diesel to 80% No.2 diesel.
In addition to blending with No.1 diesel, winter blend diesel fuel may also be treated with additives that improve cold flow properties and modify the crystal structure to prevent clogging. These additives must be added when the fuel temperature is higher than the cloud point to ensure they are fully mixed and effective.
Winter blend diesel fuel is typically used during the colder months of the year to ensure the proper functioning of diesel-powered engines. It is important for diesel-powered engines to be prepared for cold weather to avoid operational issues and engine damage.
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No.1 fuel is also known as kerosene and doesn't contain paraffin
Winter diesel fuel, also known as winter diesel, alpine diesel, or winterised diesel, is a type of diesel fuel that has been enhanced to prevent it from gelling in cold weather conditions. Diesel fuel is prone to gelling or waxing in cold weather, which refers to the solidification of diesel oil into a partially crystalline state. This solidification can cause fuel filters and injectors in engines to become clogged, leading to engine failure.
No. 1 fuel, also known as kerosene, is a key component of winter diesel fuel. Kerosene, unlike paraffin, does not contain any paraffin, which helps to lower the cloud and pour points of the winter diesel blend. This prevents the fuel from gelling in cold temperatures. During the warmer months, it is recommended to use No. 2 diesel fuel, also known as "summer" diesel fuel. Summer diesel fuel has a higher cloud point and is therefore not suitable for use in winter when a lower cloud point diesel is required.
The transition from summer to winter diesel fuel typically occurs when temperatures drop below -7°C. Winter diesel fuel is a mix of No. 1 and No. 2 fuel, with the ratio varying depending on the climate of the region. In colder regions, a higher proportion of No. 1 fuel may be required, while in milder climates, a blend of 20% No. 1 fuel and 80% No. 2 fuel is common.
In addition to the use of No. 1 fuel, winter diesel fuel can also be achieved through the treatment of additives that modify the crystal structure of the fuel to prevent the formation of larger crystals that can clog fuel filters. These additives must be added when the fuel temperature is higher than the cloud point, which is the temperature at which the fuel begins to develop solid wax particles and take on a cloudy appearance.
Overall, the use of No. 1 fuel, or kerosene, plays a crucial role in the performance and functionality of winter diesel fuel, ensuring that diesel-powered engines can operate effectively during the cold winter months.
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The blend ratio of No.1 to No.2 diesel fuels in the winter blend varies depending on the region
Winter diesel fuel, also known as winterised diesel, is a type of diesel fuel that has been enhanced to prevent it from gelling in cold weather conditions. Diesel fuel is prone to waxing or gelling in cold weather, which refers to the solidification of diesel oil into a partially crystalline state. This can cause the engine to stop running.
To prevent gelling, winter diesel fuel is created by blending No.2 diesel with No.1 diesel (kerosene) by some percentage. The blend ratio of No.1 to No.2 diesel fuels in the winter blend varies depending on the region. In colder regions, the blend ratio may be higher, with more No.1 diesel in the mix, to prevent gelling in extremely cold temperatures. In warmer regions, the blend ratio may be lower, with more No.2 diesel in the mix. Generally, the blend ratio of No.1 to No.2 diesel in winter diesel fuel is around 20:80. However, in the coldest regions, pure grade No.1 diesel fuel may be required.
The cloud point, or the temperature at which the fuel starts to develop solid wax particles, is an important factor in determining the blend ratio. The cloud point for No.1 diesel is -40 degrees Celsius, while for No.2 diesel, it is about 14 degrees Fahrenheit (-10 degrees Celsius). By blending the two types of diesel, the cloud point of the mixture can be lowered, preventing gelling in colder temperatures.
In some regions, gas stations may offer No.1 fuel at the same pump as No.2 fuel, allowing drivers to create their own winter blend depending on their local climate. Retail stores and gas stations may also offer additives that can be added to No.2 diesel to lower its cloud point and improve its cold weather performance. These additives work by modifying the crystal structure of the wax particles to prevent them from building up and forming larger crystals that can block the fuel filters.
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Additives are used to improve the cold flow properties of diesel
Diesel fuel is prone to waxing or gelling in cold weather, which refers to the solidification of diesel oil into a partially crystalline state. This solidification can cause fuel filters and injectors in engines to become clogged, leading to engine failure.
To prevent this, additives are used to improve the cold flow properties of diesel. These additives alter the properties of the fuel to prevent gelling and wax crystallization at low temperatures. Retail stores offer a number of additives that will lower the cold filter plugging point (CFPP) of diesel oil. These include products such as Bell Performance's Cold Flow Improver, which is an anti-coagulant designed to prevent diesel fuels from gelling during cold weather operation.
There are several methods to improve the cold flow behaviour of biodiesel. Biodiesel investigators have proposed the use of straight vegetable oil (SVO) additives to improve the cold weather functionality of biodiesel/diesel fuel. Blending biodiesel with petroleum diesel and solvents, as well as the addition of surfactants, has also been shown to improve cold flow properties.
It is important to note that additives must be added when the fuel temperature is higher than the crystal formation temperature (cloud point) to effectively alter the crystal structure. The additive must be fully mixed to guarantee a regulated blend.
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The cold filter plugging point (CFPP) is a standardised test that indicates the rate at which diesel fuel will flow through a filtration device when cooled
Winter diesel fuel is a blend of grade No. 1 and No. 2 diesel fuel. It is also known as alpine diesel or winterised diesel. This blend prevents the diesel from gelling in cold weather conditions. Diesel fuel is prone to waxing or gelling in cold weather, which refers to the solidification of diesel oil into a partially crystalline state.
The CFPP is vital for ensuring optimal engine performance in colder temperatures. It helps to prevent fuel filter plugging and engine problems in cold weather conditions. By understanding the CFPP, operators can anticipate and prevent issues such as filter clogging and engine malfunctions due to wax crystal formation.
There are various recognised international standards for CFPP testing methods, including IP 309, ASTM D6371, and EN 116. These tests allow users to monitor the effectiveness of additives and storage conditions in preventing filter plugging. Regular testing is important for ensuring fuel quality and operational reliability.
Retail stores offer additives that will lower the CFPP of diesel oil. These additives are most effective when added above the cloud point, allowing them to mix well with the diesel oil. While these additives will not prevent the formation of wax particles, they do hinder the particles from melding together and forming larger wax flakes that can clog the fuel filter.
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Frequently asked questions
Winter blend diesel fuel, also known as winter diesel, alpine diesel, or winterised diesel, is diesel fuel enhanced to prevent it from gelling in cold weather conditions.
Winter blend diesel fuel is achieved by treatment with additives that change the low-temperature characteristics of the fuel. The cold filter plugging point (CFPP) is based on a standardised test that indicates the rate at which diesel fuel will flow through a standardised filtration device in a specified length of time when cooled under certain conditions.
Summer diesel fuel can be used until the temperature drops below -7°C. Once the temperature drops below this, it's time to switch to the winter blend.
