The "diesel filter" should be changed every 15,000 miles. The diesel fuel filter is often a forgotten filter. The fuel put into diesel engines can contain contaminants such as dirt, rust, scale and water. These impurities can plug fuel injectors and components resulting in engine malfunction or deterioration. These contaminants often originate from dirty and rusty storage tanks, and as the vehicle ages, from corrosion within the fuel system components. All the more reason to invest in high-quality fuel filters and to maintain them at recommended intervals.
All diesel fuel contains some water, and removing it ensures longer diesel injection system life and reliability.
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