Green Business

Green Seal Standards

Our sustainability standards for products, services, and companies are based on life-cycle research, and are developed in an open, transparent, and stakeholder-involved process. Green Seal standards provide criteria and guidelines for manufacturers, service providers, and companies to work toward sustainability and Green Seal certification. Green Seal has 33 issued standards that cover 400 product and service categories.

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Vehicles & Vehicle Maintenance Products

GS-03 Re-refined Engine Oil

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GS-3 Standard
Edition 2.2, December 26, 2013


GS-3 establishes environmental requirements for internal combustion engine lubricating oil for gasoline or diesel engines re-refined petroleum based oil.

The standard includes product performance and quality requirements and environmental health requirements such as re-refined oil content, reduced toxicity of additives and reduced toxicity in packaging.

Green Seal sets leadership standards that aim to reduce, to the extent technologically and economically feasible, the environmental, health, and social impacts throughout the life-cycle of products, services, and companies. The standards may be used for conformity assessment, purchaser specifications, and public education.