* Viscosity: The number after the "W" (winter) indicates the oil's viscosity at operating temperature. 5W-20 is thinner than 5W-30.
* Engine Design: Engines are designed to operate with a specific oil viscosity. Using a thinner oil can lead to:
* Increased wear: Thinner oil might not provide enough lubrication for the engine parts, leading to increased friction and wear.
* Reduced oil pressure: Thinner oil can flow more easily, resulting in lower oil pressure, which can affect engine performance and lubrication.
* Higher oil consumption: Thinner oil may evaporate more easily, leading to higher oil consumption.
* Manufacturer Recommendations: Always refer to your car's owner's manual for the recommended oil viscosity. Using the wrong viscosity can void your warranty.
Exceptions:
* Newer engines: Some modern engines are designed to run on lower viscosity oils like 5W-20. Check your owner's manual to see if your car is compatible.
* Extreme cold weather: In extremely cold climates, using a thinner oil like 5W-20 might be beneficial for easier starting.
In Conclusion:
It's best to stick with the oil viscosity recommended by the vehicle manufacturer. Using a thinner oil without proper engine design can lead to engine problems.
