Opti-Lube Boost! Formula Diesel Fuel Additive: 1 Gallon without Accessories Treats up to 2,560 Gallons Boosts Cetane by 7-9 Points, Which Improves Fuel Economy and Increases Power! Enhanced Lubricity for Reduced Fuel System Wear Reduces Deposits & Emissions, Keepings Injectors Clean Prevents Rust & Corrosion. Improved Water Separation Improved Storage Stability (more than doubles the life of diesel)