Thursday, July 10, 2014
What Does the W Stand For in 5W-30 Motor Oil?
Without the introduction of additives, as the temperature rises oil viscosity thins. As the temperature drops the oil viscosity thickens. With the introduction of additives, oil can be rated for one viscosity when it’s cold and another when it’s hot. A thicker oil viscosity at higher temperatures usually continues to provide lubrication protection to moving parts. A thinner oil viscosity at lower temperatures flows easier and requires less energy at start up.
For 5W-30, the “5” tells you how the oil will perform at colder temperatures. A “5W” protects and performs better at lower temperatures than a “10W”. The “30” tells you how the oil viscosity will be at higher temperatures. The second number “30” will stay thicker and protect better at higher temperatures than a “20”.
Interested in learning more? Visit this page of our website to make sure you're putting the right oil in your car. It makes a difference what oil you choose.