Description The Harvest King Synthetic Blend SAE 15W 40 Heavy Duty Diesel Engine Oil 2 Gallon is designed to deliver reliable performance for high speed four stroke diesel engines operating under demanding conditions. Featuring a synthetic blend formulation, this engine oil helps maintain engine cleanliness while providing improved soot control and extended drain intervals. Built to meet requirements for modern on highway and Tier 4 non road engines, this oil also supports previous model diesel engines using fuels with varying sulfur levels. Designed for durability, this formulation helps minimize valve train wear while offering excellent oxidation stability and strong low temperature performance.Product Features:2 gallon container of engine oilSAE 15W 40 viscosity gradeSynthetic blend heavy duty diesel formulationImproved soot handling and extended drain capabilityHelps minimize valve train wearOutstanding oxidation stabilityExcellent low temperature performanceSuitable for modern and older diesel engines