“Nomor Pelumas Terdaftar” (NPT) refers to the registration number assigned to lubricant products that have been officially registered and approved by the Indonesian authorities, specifically the Directorate General of Oil and Gas (Ditjen Migas) or the Directorate General of New and Renewable Energy and Energy Conservation (EBTKE). This registration ensures that lubricants meet the required safety, quality, and environmental standards before they can be distributed and sold in the Indonesian market. The NPT serves as a mark of compliance, providing assurance to consumers and businesses that the lubricants they purchase have undergone the necessary assessments and are deemed suitable for use in various applications, including automotive, industrial, and marine sectors.