The type of motor oil you use is one of the most crucial aspects of maintaining your luxury vehicle's engine, so it's no wonder that many of our customers ask, "What do motor oil viscosity ratings mean?" Motor oil plays a crucial role in your engine's performance and longevity, so let's look at viscosity ratings.
Understanding Engine Oil Viscosity
Viscosity refers to a fluid's resistance to flow. The Society of Automotive Engineers (SAE) standardized a measurement system to help manufacturers supply the optimal oil for their vehicles.
Breaking Down the Numbers and Letters
The numbers and letters in motor oil viscosity ratings have specific meanings:
The First Number indicates the oil's viscosity at low temperatures. The "W" stands for "winter," emphasizing the oil's performance in cold conditions. In a 5W-30 oil, the "5W" means the oil remains fluid at lower temperatures, making it easier to start. For example, a new Volvo XC60 Recharge often has an SAE 0W-20 oil viscosity rating.
The Second Number represents the oil's viscosity at high temperatures. Higher numbers mean the oil is thicker, providing better lubrication at higher temperatures.
Choosing the Right Viscosity
Selecting the appropriate viscosity rating depends on several factors:
Manufacturer Recommendations: Always refer to your luxury Volvo vehicle's owner manual for the recommended oil viscosity. After you take home one of our new Volvo Cars deals in Jacksonville, FL, our service team will ensure you have the ideal oil.
Climate: Local climate plays a significant role in determining the right oil viscosity. If you drive a Volvo XC90 Recharge plug-in hybrid, climate can impact your electric battery and the gasoline engine's oil.
Driving Conditions: Frequently tow heavy loads or drive in traffic? You might benefit from oil with a higher viscosity at high temperatures.
Shop new Volvo Cars at our dealership and rely on our service center for your next oil change.
FAQ
What does an oil's viscosity rating tell you?
Oil viscosity rating indicates resistance to flow at different temperatures. In 10W-30, the first (10W) measures viscosity at colder temperatures and the second (30) at higher temperatures. Lower first numbers mean better flow in cold conditions, which is crucial for starting engines. In comparison, higher second numbers denote better performance at high temperatures, ensuring engine protection under heat stress.
Is higher viscosity engine oil better?
Higher viscosity engine oil isn't necessarily better; it depends on your engine's requirements and operating conditions. Higher viscosity oils provide better protection at high temperatures and reduce wear in older engines. However, they might flow less easily in cold weather. Lower viscosity oils improve cold starts and fuel efficiency. Always follow your vehicle manufacturer's recommendations for optimal performance and protection.
Which oil is thicker, 5W-20 or 5W-30?
The oil labeled 5W-30 is thicker than 5W-20. Both have the same viscosity rating at cold temperatures (5W), ensuring similar performance during cold starts. 5W-30 maintains a thicker consistency at higher temperatures than 5W-20. This means 5W-30 provides more protection in hotter conditions but may affect fuel efficiency slightly compared to the thinner 5W-20.
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