Maintaining diesel fuel quality is crucial when managing an over-the-road (OTR) fleet to ensure optimal vehicle performance and longevity. Water contamination in diesel fuel can lead to serious issues, from engine damage to reduced fuel efficiency. This is why it is essential to know how to get rid of water in diesel fuel.

In this blog, we’ll explore the essential practices for OTR fleet managers to handle water contamination in diesel fuel systems effectively. We’ll discuss the risks, early detection signs, preventive measures, and advanced methods for removing water from diesel fuel. This way, you can ensure compliance with regulatory standards.

Understanding the Risks of Water Contamination in Diesel Fuel

Water contamination in diesel fuel poses significant risks, impacting both the vehicle’s performance and the fleet’s bottom line. Here are some key issues caused by water in diesel:

1. Engine Damage: Water in diesel fuel can cause serious engine damage. It leads to corrosion within the fuel system, including the fuel injectors and fuel pump, resulting in costly repairs.
2. Reduced Fuel Efficiency: Contaminated fuel can decrease combustion efficiency, leading to higher fuel consumption and reduced mileage.
3. Fuel System Issues: Water presence can cause fuel filter blockages, impacting the fuel flow and leading to engine stalls.
4. Diesel Bug Contamination: Microbial growth, commonly known as the diesel bug, thrives in the presence of water, leading to sludge formation and further contamination.¹

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Detecting Water in Diesel Fuel Systems: Signs and Symptoms

Early detection of water in diesel fuel is crucial to mitigate its adverse effects. Fleet managers should be vigilant for these signs and symptoms:

• Cloudy Fuel: Water in diesel fuel often causes a cloudy appearance.
• Rust and Corrosion: Visible rust in the fuel tank or fuel system components indicates water contamination.
• Engine Performance Issues: Unexplained power loss, misfires, or engine stalling can be symptoms of water in the diesel fuel tank.
• Frequent Fuel Filter Changes: If you’re changing fuel filters more often than usual, it could be due to water contamination.
• Unusual Sounds: Water in the fuel can cause knocking or pinging sounds in the engine.

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Preventive Measures to Avoid Water Contamination in OTR Operations

Preventing water contamination in diesel fuel starts with proper storage, handling, and maintenance. Here are some best practices:

• Use Quality Fuel: Always source ultra-low sulfur diesel from reputable suppliers to minimize the risk of contamination. Learn how to choose the right diesel fuel type for your fleet.
• Regular Fuel Testing: Conduct regular fuel testing for water content to detect contamination early. Consider whether you use regular or renewable diesel.
• Proper Storage: Store diesel in well-sealed, moisture-proof fuel storage tanks. Use steel tanks with protective linings to prevent tank corrosion.
• Water Separators: Install water separators in the fuel system to remove free water and emulsified water from diesel fuel.²
• Fuel Additives: Use diesel additives designed to disperse water and prevent microbial growth.
• Tank Maintenance: Regularly clean fuel tanks to remove sludge and water accumulation at the tank bottom. Please also check if your diesel fuel has a shelf life.

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Effective Methods for Removing Water from Diesel Fuel

If water contamination is detected, immediate action is necessary to remove it. Here are some effective methods:

1. Drain Water from Fuel Tanks: Periodically drain water from the bottom of fuel tanks, where water typically accumulates.
2. Water Absorbing Filters: Use water absorbing filters that can capture water droplets from the fuel.
3. Centrifugal Separators: Employ centrifugal separators that use high-speed spinning to separate water from diesel fuel.
4. Desiccant Breathers: Install desiccant breathers on storage tanks to prevent moisture intrusion from the air.
5. Fuel Polishing Systems: Use fuel polishing systems that continuously filter and clean the fuel, removing water and contaminants.

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Regulatory Compliance: Key Guidelines for Managing Diesel Fuel Quality

Adhering to regulatory standards is essential for managing diesel fuel quality and mitigating water contamination risks. Here are some guidelines:

• EPA Regulations: Comply with the Environmental Protection Agency (EPA) regulations on fuel storage and handling.³
• ASTM Standards: Follow ASTM International standards for diesel fuel quality and water content limits.
• Regular Inspections: Conduct regular inspections and maintenance of fuel storage facilities to ensure compliance.
• Documentation: Maintain detailed records of fuel testing, maintenance, and corrective actions taken to address contamination issues.

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Connecting Fuel Cards with Diesel Fuel Management

Integrating fleet fuel cards into your diesel fuel management practices can streamline procurement and reduce the risk of water contamination incidents. Here’s how:

• Enhanced Monitoring: Fuel cards provide real-time data on fuel purchases, helping track fuel quality and detect anomalies.
• Streamlined Procurement: Simplify fuel procurement processes with fuel cards, ensuring you purchase from reputable sources.
• Cost Savings: Take advantage of fuel discount programs to reduce fuel costs and manage the budget effectively.
• Preventive Measures: Use fuel cards that offer access to fuel stations with high-quality diesel and proper storage facilities, minimizing contamination risks.

Managing water contamination in diesel fuel is crucial for OTR operations. Understand the risks, detect early signs, implement preventive measures, and use advanced water removal methods. This ensures optimal fuel quality and performance. Adhere to regulatory standards and integrate fuel cards into your diesel fuel management practices to streamline operations and mitigate contamination risks.

With these best practices, AtoB supports fleet managers in maintaining efficient and cost-effective OTR operations. Our fleet fuel card with discounts ensures that every mile is covered without the worry of water-related diesel fuel problems.

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Sources:

Conidia. DIESEL BUG. https://conidia.com/diesel-bug/

Rycofilters. FUEL WATER SEPARATOR TECHNICAL. https://rycofilters.com.au/articles/fuel-water-separators

United States Environmental Protection Agency. Aboveground Storage Tanks. https://www.epa.gov/ust/aboveground-storage-tanks

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