The ISO DIS 3104-0 standard defines a method for determining the kinematic viscosity of petroleum products and Miscellaneous liquids by both manual and automated procedures. The manual procedure (Procedure A) is used for reference testing, while the automatic procedure (Procedure B) is suitable for automated testing. This method covers a wide Temperature range from -20 ° C to + 150 ° C and is suitable for liquids with kinematic viscosity from 0.2 mm ²/s to 300,000 mm ²/s. The standard is particularly suitable for transparent and opaque petroleum products, ensuring measurement accuracy and Repeatability, essential for optimizing product storage and handling conditions.