Sinopec 15W40 Classic Diesel Engine Oil - 55 Gallon Drum Sinopec Tulux t500 15w-40 classic diesel engine oil is formulated with hydrocracked high viscosity index base oils Excellent soot control, suitable for use in engines with or without erg systems Both light-duty and heavy-duty vehicles operating under severe conditions, such as long-distance or urban traffic vehicles Off-highway applications in the mining, quarrying, construction and agricultural industries Heavy duty diesel engines operating continuously under heavy or high load-factor conditions