2003 Lexus GS 300 Owners Manual - Page 284

ENGINE Engine oil selection "Toyota Genuine Motor Oil" is filled in your Lexus vehicle. Use Lexus approved "Toyota Genuine Motor Oil" or equivalent to satisfy the following grade and viscosity. Oil grade: API grade SL "Energy-Conserving" or ILSAC multigrade engine oil. Recommended viscosity: 5W-30 Oil identification marks 62L038 62sa08 Temperature range anticipated before next oil change SAE 5W-30 is the best choice for good fuel economy, and good starting in cold weather. If SAE is not available, SAE10W-30 may be used. However, it should be replaced with 5W-30 at the next oil change. "API Service Symbol "ILSAC Certification Mark Either or both API registered marks are added to some oil containers to help you select the oil you should use. D The API Service Symbol is located anywhere on the outside of the container. The top portion of the label shows the oil quality by API (American Petroleum Institute) designation such as SL. The center portion of the label shows the SAE viscosity grade such as SAE 5W-30. "Energy-Conserving", shown in the lower portion, indicates that the oil has fuel-saving capabilities. D The ILSAC (International Lubricant Standardization and Approval Committee) Certification Mark is displayed on the front of the container. 263