What type of engine oil viscosity does 2003 echo requires?

The recommended engine oil viscosity for a 2003 Toyota Echo depends on the climate where you live. Check your owner's manual for the most accurate information, but generally:

* For warmer climates: 10W-30 is often recommended.

* For colder climates: 5W-30 is often preferred for easier cold-weather starting.

Always consult your owner's manual for the manufacturer's specific recommendations for your particular 2003 Echo model (some may have slightly different specifications based on engine type). The manual will specify the viscosity grade and the API service classification (e.g., SM, SL, etc.) of the oil.