Mobil Delvac 1300, Gallon, 15W40, CK-4 Super Diesel Engine Oil, Extra High Performance, Helps Extend Engine Life In Some Of The Most Severe On & Off Highway Applications While Delivering Excellent Performance, Soot Viscosity Control Enables Greater Engine Efficiency, Long Engine & Oil Life, Thermal & Oxidation Stability Helps Reduce Engine Deposits & Sludge Build Up To Keep Engines Running Reliably, Enhanced TBN Reserves Improves Corrosion Protection & Extends Drain Intervals For Both New & Old Engines Using Either Low 500 PPM Or Ultra Low 15 PPM Sulfur Diesel Fuel, Low Temperature Pumpability, Corrosive & Abrasive Wear Resistance, Excellent Oil Consumption Control Requires Less Make Up Oil During Operation, Meets Demanding Specifications Of Key Oems.