What kind of oil is sae 5w 30

As contaminants begin to work their way into the oil, the overall trend over a long duration is that the oil thickens across the entire spectrum. An old and used conventional 5W oil behave very differently than a brand new 5W Synthetic oils work quite differently. From the start, the chemical structure is designed to match a specific multi-grade oil. That means even without additives, you could have a 5W motor oil, and then certain additives like rust-inhibitors or dispersants will be added to further improve the usefulness of the oil.

The result is that over time the synthetic oil does not degrade away back to a less desirable oil as conventional ones do. From a viscosity standpoint, an old 5W synthetic will act pretty similar to a new 5W synthetic, although likely it will be slightly thicker as a result of contaminants. Why does all this matter? Choosing the Right 5W Oil for Your Car If your car requires a 5W engine oil, Castrol offers a full range of options to meet the needs of every driver and vehicle manufacturer.

Choosing the right 5W oil for your car. Castrol 5W Product Range. Ben Davis March 16, What is the difference between SAE 30 oil and 5w30? What happens if you use 10W30 instead of 5w30? What is 5w oil used for? How long does 5W oil last? What is the best 5W oil? Be certain to use the oil viscosity that is called for by your vehicle owner's manual. Christopher John has been a freelance journalist since