Opti-Lube Summer+ Formula Diesel Fuel Additive: 1 Gallon with Accessories (1 Hand Pump, 2- Empty 4oz Bottles) Treats up to 2,560 Gallons Boosts Cetane and Enhanced Lubricity for Reduced Fuel System Wear. Improved Fuel Economy, Increased Power Cleans Injectors, reduceses Deposits and Emissions. Prevents Rust & Corrosion Improved Water Separation and Storage Stability (More than doubles storage life of diesel fuel) Improved Storage Stability (More than doubles storage life of diesel fuel)