Zhong Zheng Wang·2025-07-22 02:35Group 1 - The D1 standard for diesel engine oil, marking a significant breakthrough in China's industrial sector, has been officially released, representing a shift from "standard following" to "standard leading" in the lubricating oil industry [1][4] - The D1 standard addresses the long-standing dominance of the American API standards in China, which lacked standards tailored to the country's complex road conditions and fuel characteristics [2] - Weichai Power, as a core member of the Engine Lubricating Oil China Standard Development Innovation Alliance, played a crucial role in developing the D1 standard by assembling a cross-disciplinary expert team and leveraging resources [2][3] Group 2 - The WP13 engine was selected as the core verification vehicle for the D1 standard due to its ability to simulate extreme operating conditions, providing a solid foundation for the standard [3] - The D1 standard has resulted in significant economic benefits, such as extending the oil change interval from 60,000 kilometers to 120,000 kilometers, thereby reducing operational costs for users [4] - The establishment of the D1 standard has enhanced China's technical discourse power in the industry, allowing for the development of a "native compatible" lubricating oil system for engines in the National VI/VII stages [4]