Regan Brown
Diesel fuel can go bad due to environmental factors, such as exposure to air, water, heat, and light, which accelerate the natural processes that cause the fuel to break down. To prevent this, diesel fuel additives or conditioners can be used to improve engine performance and extend the life of the engine. Diesel Treat, for example, is a popular fuel conditioner that removes water, prevents deposits, and provides lubrication, enhancing the performance of diesel engines. Therefore, it is important to understand whether diesel fuel conditioners themselves have an expiration date or can go bad over time.
Diesel Fuel Conditioner Characteristics
| Characteristics | Values |
|---|---|
| Exposure to air | Accelerates the process of diesel going bad |
| Exposure to water | Can be removed by diesel fuel conditioners |
| Exposure to heat and light | Causes diesel to go bad more quickly |
| Microbial growth | A common issue due to modern diesel fuels lacking higher sulfur levels |
| Lubricity | Enhanced by diesel fuel conditioners |
| Cetane rating | Requires protection by additives |
| Cold weather performance | Improved by diesel fuel conditioners |
| Stability | Requires protection by additives |
| Gelling | Prevented by diesel fuel conditioners |
| Engine deposits | Prevented by diesel fuel conditioners |
| Engine smoking | Reduced by diesel fuel conditioners |
| Engine performance | Enhanced by diesel fuel conditioners |
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What You'll Learn
Environmental factors that cause diesel to go bad
Diesel fuel can be negatively impacted by various environmental factors, leading to its degradation over time. Here are some key environmental factors that can contribute to the deterioration of diesel fuel:
Climate Change: Climate change, influenced by diesel emissions, affects air and water quality, weather patterns, sea levels, ecosystems, and agriculture. The emissions from diesel engines contribute to the formation of ground-level ozone, which can damage crops, trees, and vegetation. Additionally, acid rain produced by diesel emissions impacts soil, lakes, and streams, eventually entering the human food chain.
Air Pollution: Diesel engines emit a mixture of gaseous and solid pollutants, including diesel particulate matter (DPM) and volatile organic compounds. DPM, composed of carbon particles (soot) and organic compounds, contains cancer-causing substances such as polycyclic aromatic hydrocarbons, benzene, and formaldehyde. The gaseous pollutants include oxides of nitrogen (NOx), which contribute to the formation of ground-level ozone and PM2.5, adversely affecting air quality and human health.
Water Supply: The early melting of snow packs, such as in the Sierra Nevada, has been linked to diesel exhaust emissions. This contributes to the serious decline in water supply in regions like California. The darkening of snow and ice by black carbon (BC) deposition accelerates melting, impacting water availability and ecosystems.
Visibility Reduction: Diesel emissions have been associated with reduced visibility, particularly in regions like the San Joaquin Valley and southern California. The scattering and absorption of sunlight by particles and gases present in diesel emissions contribute to this decrease in visibility.
Health Risks: Exposure to diesel exhaust poses significant risks to human health. It can lead to serious health conditions such as asthma and respiratory illnesses and exacerbate existing heart and lung diseases, especially in children and the elderly. Elevated levels of diesel particulate matter (DPM) in urban areas, due to the proximity of major diesel emission sources, result in greater health consequences for the population.
These environmental factors highlight the importance of reducing diesel emissions and exploring cleaner alternatives to mitigate their impact on the environment and human health.
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How diesel fuel conditioner prevents gelling
Diesel fuel is susceptible to gelling in cold weather. This is because it contains wax, which begins to crystallise and form solid particles at temperatures below 10 or 15 degrees Fahrenheit. The crystallised wax can clog fuel filters, lines, and fuel rails, preventing the flow of fuel to the engine and resulting in reduced engine performance or even engine failure.
Diesel fuel conditioners, such as Howes Diesel Treat, are designed to prevent gelling by lowering the temperature at which the fuel reaches its pour and gel points. This means that the fuel can remain in a liquid state at lower temperatures, reducing the risk of wax crystallisation and the associated issues.
Diesel fuel conditioners work by dispersing water and removing impurities from the fuel. They also act as lubricants, reducing friction and wear on fuel system components. In addition, diesel fuel conditioners can improve the combustion process, resulting in improved engine performance and reduced emissions.
It is important to follow the directions on the bottle when using a diesel fuel conditioner. In areas with consistently cold temperatures, it is recommended to use a diesel fuel conditioner with every fill-up to prevent gelling and maintain engine performance.
By using a diesel fuel conditioner, such as Howes Diesel Treat, you can effectively prevent diesel fuel gelling and keep your engine running smoothly, even in the coldest temperatures.
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Microbial growth in diesel
Water is the primary enabler of microbial growth in diesel fuel. Modern biodiesel is hygroscopic, meaning it readily absorbs water from condensation, rainwater, or even the air. The presence of water encourages the growth of microbes, which can occur at the interface between the oil and water or on the tank walls, depending on the microbial need for oxygen. Species of microbes that may grow in diesel fuel include bacteria such as Clostridium, Desulfotomaculum, Pseudomonas, and various fungi such as Aspergillus and Candida.
The signs of microbial growth in diesel fuel include fuel discoloration, with infected fuel turning a dark khaki color instead of the bright yellow-green of fresh diesel. Additionally, a rotten fuel smell may be noticeable due to the sulfuric acidic byproducts produced by the microbes. Black exhaust smoke during system startup is another indicator, resulting from the engine's inability to completely combust the contaminated fuel and the presence of microbial byproducts. Microbial growth can also lead to increased corrosion and deposit buildup, causing premature wear on engine components and higher oil consumption.
To prevent and address microbial growth in diesel fuel, the focus should be on controlling tank water buildup. This can be achieved through regular water removal from the tank, filtration, and/or the use of biocide additives. Microbial testing kits are also available to help identify and locate infestations, aiding in the determination of the appropriate course of action for treatment.
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Extending the life of diesel with additives
Diesel fuel has an average shelf life of about six months. However, there are ways to extend its lifespan.
Firstly, keep the fuel dry. Water exposure is a significant cause of fuel degradation. Additionally, maintain the temperature of the fuel at around 70°F. If it's too cold, the diesel will gel, and if it's too hot, it will degrade quickly.
Another way to extend the life of diesel is to use a fuel biocide. A biocide is essential for effectively preserving fuel and fuel systems. Biobor JF, for example, will preserve the fuel by killing any microbial contaminants.
Using a multi-functional fuel additive can also increase the shelf life of diesel. For instance, Biobor MD is a marine and over-the-road fuel additive that improves fuel performance, increases lubricity, and lowers costs.
Some people also use injector cleaners and diesel treatments as additives to extend the life of their diesel. While some swear by them, others believe they are a waste of money and do not make a noticeable difference.
It is important to note that not all additives are effective, and some may even be harmful. For example, some additives can void warranties, especially if they contain emulsifiers. Additionally, some people believe that additives can allow water into the injector and destroy it.
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How diesel fuel conditioner improves engine performance
Diesel fuel conditioners, or additives, can improve engine performance in several ways. Firstly, they can raise the cetane number of the fuel, which improves ignition speed and combustion performance. This, in turn, can enhance the engine's acceleration and fuel economy.
Secondly, additives act as lubricants, protecting fuel system components such as pumps and injectors from premature deterioration and failure. They also help to clean and maintain these parts, ensuring efficient fuel flow and engine performance.
Some additives are designed to address issues specific to diesel engines in severe cold conditions. For example, in extreme cold, diesel fuel can transform into a waxy, glue-like gel, which can cause severe damage to the engine. Additives can prevent this by ensuring smooth fuel flow and protecting the engine.
Additionally, diesel fuel conditioners can help remove excess water and contaminants from the fuel system, further enhancing performance and longevity.
While opinions vary on the effectiveness of diesel fuel additives, many people swear by their ability to improve engine performance and fuel efficiency. Some additives are also marketed as providing year-round diesel engine performance improvement and trouble-free winter operability.
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Frequently asked questions
Diesel fuel conditioner is a type of additive that is used to improve the performance and longevity of diesel engines. It can also help to prevent issues such as gelling in cold weather and microbial growth.
Diesel fuel conditioner itself does not typically "go bad" in the same way that diesel fuel does. However, it is important to note that diesel fuel can break down over time due to exposure to environmental factors such as air, water, heat, and light, as well as microbial growth.
The usable life of diesel fuel is now measured in months instead of years due to the faster breakdown process. Diesel fuel conditioners can help extend the life of diesel fuel and improve its performance, but they may not prevent eventual breakdown.
