Here's why:
* Engine type: The specific type of engine in your snowblower (e.g., Briggs & Stratton, Honda, etc.) determines the appropriate oil.
* Oil viscosity: The recommended viscosity (like 5W-30, 10W-30) varies based on the engine and operating temperature.
To find the correct engine oil for your Toro 521, I recommend:
1. Check your owner's manual: The manual is the most reliable source for this information. It should list the recommended engine oil type and viscosity.
2. Look for a sticker on the engine: Some engines have a sticker with oil recommendations.
3. Contact Toro: Visit the Toro website or call their customer support line for assistance. They can provide the correct oil specifications.
Important Note: Using the wrong type or viscosity of engine oil can damage your snowblower's engine.
