What does 30W mean in oil?
Oils with a 30W grade viscosity are more lightweight, contain more friction-reducing additives to improve fuel economy and allow more efficient engine startup even in cold conditions.
What does the W in a grade of motor oil stand for?
What does the “w” in a grade of motor oil stand for? The “w” in motor oil stands for winter. The first number in the oil classification refers to a cold weather viscosity. The lower this number is, the less viscous your oil will be at low temperatures.
What does the number before W mean on a 5W 30?
In a 5W-30 for example, the number before the W describes the viscosity of the oil at low temperatures. The lower the number, the thinner the oil and the better the oil’s cold temperature/ cold start performance.
What does the number W mean in viscosity of oil?
The higher number, following the “w” refers to hot weather viscosity, or how fluid your oil is at hot temperatures. The higher the number, the thicker the oil at a specified temperature. Is thicker oil better?
What do the numbers on a motor oil mean?
The short answer:The numbers represent the viscosity of the oil and the W stands for WINTER. The long answer:The Society of Automotive Engineers (SAE) has established a numerical code system for grading motor oils according to their viscosity characteristics.
What does the W stand for 10W40?
It is labeled with two numbers and the letter W, such as 10W-40. The W actually stands for “winter” but basically means “viscosity when cold.”. So 10W-40 oil acts like SAE 10 oil when it’s cold, but acts like SAE 40 oil when it’s hot.
What is the difference between 5W-30 and 10W-30?
8 Answers In short, 5w30 is less viscous or thinner at lower temperatures than 10w30 and thus flows more readily when your vehicle is cold. The difference between 5w 30 and 10w 30 is the thickness of the oil, 5w 30 being thinner. 5W30 and 10W30 are the oil viscosity.
Why use higher viscosity oil?
Controlling the viscosity of fuel oil is an important aspect of an efficient combustion. A high viscosity fuel oil leads to improper atomisation which in turn leads to incomplete combustion.High viscosity fuel prevents correct atomisation,which takes place in the fuel injectors.
What does viscosity of oil mean?
Simply put, viscosity is the oil’s resistance to flow or, for the layman, an oil’s speed of flow as measured through a device known as a viscometer. The thicker (higher viscosity) of an oil, the slower it will flow.