Your diesel generator is only as dependable as the fuel that powers it. Even the most advanced generator can experience performance problems if the diesel inside the tank has deteriorated. Over time, exposure to air, heat, and moisture can cause diesel to break down—leading to poor combustion, higher emissions, and costly maintenance. For businesses and facilities in the UAE, where temperature and humidity levels are high, proper fuel care is essential. In this guide, we’ll walk you through how to store, treat, and protect your diesel fuel for long-term reliability. Why Diesel Fuel Loses Quality Diesel isn’t a permanent energy source—it naturally changes over time. Without the right precautions, stored fuel can degrade within months. Here’s what typically causes this breakdown: Oxidation: Contact with air turns diesel darker and thicker, forming sticky deposits. Water Build-Up: Condensation inside the tank mixes with fuel, promoting microbial growth. Bacteria and Fungi: Microbes feed on diesel at the water-fuel interface, forming sludge that blocks filters. Extreme Temperatures: Prolonged heat speeds up the chemical breakdown of diesel molecules. When this happens, fuel quality declines, efficiency drops, and generators become harder to start or maintain.