Program to Simplify the Classification of Motor Lubricating Oil

By analyzing the internal-combustion engine oil and gear oil of the ground vehicles, the variety and trademark of the oils have been simplified. In the future, the lower-level oil of internal-combustion engine will be given up, its trademark will be simplified as SD, SE, CC and CD. As the gasoline engine oil and diesel oil are interchangeable, the trademark will be simplified as SD/CC and SE/CD. The grade of the gear oil will be simplified into two kinds: the common vehicle and the overloaded vehicle.