2003 Lexus GS 300 Owners Manual - Page 291

CHASSIS SPECIFICATIONS (GS430) - DIFFERENTIAL Oil capacity Oil type and viscosity Vehicles without synthetic oil information label Vehicles with synthetic oil information label* 1.35 L (1.42 qt., 1.19 lmp.qt.) Hypoid gear oil API GL-5 Above -18_C (0_F): SAE 90 Below -18_C (0_F): SAE 80W or SAE 80W-90 Toyota Genuine Differential Synthetic gear oil API GL-5 SAE 75W-90 or its equivalent NOTE: *Vehicles with synthetic oil information label only: The following label is affixed on the right side of the differential carrier. Use the type and viscosity shown on the label when the differential oil is replaced. NOTICE Vehicles with synthetic oil information label only: Use of differential oil other than "Toyota Genuine Differential Synthetic gear oil API GL-5 SAE 75W-90" or its equivalent may damage the differential gear of your vehicle and diminish fuel efficiency. For the reasons mentioned above, Lexus recommends use of "Toyota Genuine Differential Synthetic gear oil API GL-5 SAE 75W-90". Another differential oil of matching quality can also be used, (but note that despite the similarity in nomenclature between "Toyota Genuine Differential Synthetic gear oil API GL-5 SAE 75W-90" and oils that meet SAE 75W-90 specifications, compliance with the SAE specification does not guarantee that an oil has all characteristic required to avoid the problem described above.) If you are unable to locate an equivalent to "Toyota Genuine Differential Synthetic gear oil API GL-5 SAE 75W-90", contact your Lexus dealer for further details or another duly qualified and equipped professional. Synthetic oil information label 270