* 10W: This indicates the oil's viscosity at cold temperatures. The "W" stands for "Winter." A lower number (like 10) means the oil is thinner and flows easier in cold weather, allowing your engine to start easier.
* 40: This indicates the oil's viscosity at operating temperature. A higher number (like 40) means the oil is thicker and provides better protection for your engine at high temperatures.
Why 10W-40 oil is common for 4-stroke engines:
* Good balance: 10W-40 oil offers a balance between cold-start performance and high-temperature protection, making it suitable for a wide range of conditions.
* Traditional choice: It's often recommended for older 4-stroke engines, especially those with higher mileage.
* Versatile: Many modern engines can also use 10W-40 oil, although manufacturers often recommend specific oil types based on your engine's design and operating conditions.
Important Note:
* Always consult your owner's manual: It's the most important source of information about what type of oil your specific engine requires. The manual will list the recommended viscosity range and other important details.
* Consider your driving conditions: If you live in a very hot climate, you might need a thicker oil with a higher second number (e.g., 10W-50). Conversely, if you live in a very cold climate, you might want a thinner oil (e.g., 5W-30).
Using the right oil is crucial for maintaining your engine's health. Remember, the information provided here is general, and it's always best to refer to your owner's manual and consult a mechanic if you have any questions about the best oil for your engine.
