Shell Turbo Oils T have long been regarded as the industry standard turbine oil. Building on this reputation, Shell Turbo Oils T have been developed to offer improved performance capable of meeting the demands of the most modern steam turbine systems and light duty gas turbines, which require no enhanced anti-wear performance for the gearbox. Shell Turbo Oils T Approvals and Recommendations: Alstom Power HTGD 90 117 V0001R and NBA P5001 Siemens TLV 9013 04/01 General Electric GEK 28143A Westinghouse 21 T0591 Solar Turbines ES 9-224U Mitsubishi Heavy Industries E00-87182 ISO 8068 ASTM D 4304, Type I (non-EP)