Castrol Viscogen™ G and G 175 are especially formulated for use in hollow glass machines. The transparent oils do not contain solids and leave no residues even when overheated. Viscogen G and G 175 maintain their lubricity up to temperatures of &plus200°C / &plus392°F and feature an excellent loadcarrying capacity. They reduce friction and offer optimum wear protection. Viscogen G and G 175 are more economical in use than conventional mineral or synthetic oils.