2004 Toyota Corolla Owners Manual - Page 225

'04 Corolla_U (L/O 0306) SAE 5W−30 is the best choice for good fuel economy, and good starting in cold weather. If SAE 5W−30 oil is not available, SAE 10W−30 oil may be used. However, it should be replaced with SAE 5W−30 at the next oil change. Oil identification marks Either or both API registered marks are added to some oil containers to help you select the oil you should use. 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) designations 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. The ILSAC (International Lubricant Standardization and Approval Committee) Certification Mark is displayed on the front of the container. API service symbol ILSAC certification mark 225 2004 COROLLA from Oct. '03 Prod. (OM12859U)