2009 Toyota Sienna Owners Manual - Page 466

4-3. Do-it-yourself maintenance n Recommended viscosity 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. Outside temperature n How to read oil container labels Some oil containers are labeled with ILSAC certification marks that help you to select the proper oil. 4 Maintenance and care 441