Gumout All-In-One Diesel Complete Fuel System Cleaner is a multifunctional diesel fuel additive that cleans the entire diesel fuel system, not just injectors like other diesel additives. For example, it will also clean fuel pumps and high pressure pumps. The product improves fuel economy, improves cold starting, restores power, prevents gelling, boosts cetane, fixes existing gelling, prevents fuel pump water, increases lubricity, helps stop fuel-filter icing, removes water, reduces emissions, prevents filter plugging, and prevents corrosion. It truly is All-In-One!