Fits: Universal Opti-Lube XPD is the ultimate in performance diesel fuel additives. The best diesel fuel additive on the market. Opti-Lube XPD’s primary purpose is to increase the lubricity properties of ultra low sulfur diesels (ULSD). However, improving Lubricity is just the beginning. XPD Formula is a multi-functional additive for upgrading the quality and enhancing the performance of diesel fuels. XPD simultaneously improves lubricity, efficiency, cleans injectors, improves Cetane by up to 3 points, and contains an anti-gel to keep your fuel flowing down to -10°F. Features: Enhanced Lubricity for Reduced Fuel System Wear Improved Fuel Economy Increased Power Reduced Deposits Reduced Emissions Prevents Rust & Corrosion Cleans Injectors, keeps them clean Improved Storage Stability (More than doubles storage life of diesel fuel) Improved Water Separation Improved Cold Weather Performance Compatible with all vehicle emissions systems Includes: 1 Quart XPD Formula Notes: XPD Treatment Rates: Standard Treatment Rate: 1 to 512 minimum (.25oz per gallon of fuel) Premium Treatment Rate (cold weather): 1 to 256 (.5oz per gallon of fuel) 1 8 pack of 4oz bottles treats 64 - 128 gallons of diesel fuel 1 6 pack of 8oz bottles treats 96 - 192 gallons of diesel fuel 1 quart treats 64 - 128 gallons of diesel fuel 1 gallon treats 256 - 512 gallons of diesel fuel 5 gallon pail treats 1,280 - 2,560 gallons of diesel fuel 55 gallon drum treats 14,080 - 28,160 gallons of diesel fuel