Quick Answer
Old diesel fuel can be used with new equipment, but it's essential to follow guidelines to minimize risks, such as checking fuel degradation, water content, and additive levels, to ensure equipment longevity and performance.
Fuel Storage Guidelines
When using old diesel fuel with new equipment, it’s crucial to follow proper storage and handling procedures. The American Petroleum Institute (API) recommends that diesel fuel should not be stored for more than six months, as it degrades over time. If you’re using fuel that has been stored for longer, inspect it for signs of degradation, such as sludge, sediment, or water separation. Check the fuel for its Water and Sediment (W&S) level, which should not exceed 0.05% for new equipment.
Fuel Degradation and Additives
Old diesel fuel often contains less effective additives, which can negatively impact engine performance and longevity. The fuel’s age and storage conditions affect the additive’s potency. For example, a common additive, Detergent Dispersant (DD), typically lasts for six months. If you’re using old fuel with low additive levels, consider adding a fuel treatment or additive specifically designed for older fuels to help clean and stabilize the fuel system.
Equipment Considerations
When using old diesel fuel with new equipment, always check the manufacturer’s recommendations and guidelines. Modern engines are designed to run on high-quality fuels, and using old fuel may void warranties or compromise engine performance. Consider the type of equipment and its intended use. For example, a generator designed for frequent use may require a higher-quality fuel to maintain performance and longevity. Always follow the equipment manufacturer’s recommendations and guidelines for fuel usage and storage.
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