Full Synthetic 15W-40 Heavy Duty Diesel Engine Oil With Advanced Nano TS2 Guard™ 5 GALLON BUCKET or 55 GALLON DRUM Lorenzo's Engine Oil is a premium synthetic oil enhanced with TS2 Guard™, our proprietary dual-stage protection system. TS2 Guard™ protects in two stages: • First, its nano-sized spheres reduce friction by rolling between surfaces under light load. • Then, under pressure, they bond to the metal and form a microscopic tribofilm that fills surface roughness and shields against wear. The result is a dual-action lubricant that smooths, protects, and enhances performance at the molecular level.This dual-action protection achieves an extremely low coefficient of friction (0.03 at 1200°F) and an extreme load capacity of 100,000 psi. Designed to meet the demands of modern heavy-duty diesel engines, it enhances emissions system protection, improves fuel economy, and exceeds the requirements of new generation GHG'17 model heavy duty diesel engines and API CK-4. It is fully backward compatible with previous API service categories and is suitable for use with both ultra-low and low sulfur diesel fuels.  Advanced Nano TS2 Guard™ features:• Extremely low coefficient of friction (0.03 at 1200°F)• Extremely high load capacity of 100,000 psi Advanced Nano TS2 Guard™  benefits: • Engine runs quieter, cooler, and more efficiently • More efficient fuel consumption • Extended engine life • Quieter engine • Enhanced power and torque • Less harmful emissions • Backward compatible with previous API oil service categories