You depend on your diesel-powered machine to get you where you need go, so keep it properly maintained with Lucas Anti-Gel Cold Weather Diesel Treatment. This fuel system additive is specifically designed to prevent cold filter plugging in diesel and bio-diesel fuels. It contains real water dispersants to effectively remove moisture from the entire fuel system—and prevents fuel thickening and gelling. Lucas Anti-Gel diesel treatment is alcohol-free, has no harmful effect on diesel particulate filters, and this product won't void warranties!