Do different oils have different weights?
Oil weight doesn’t refer to how heavy an oil is; it’s a measure of viscosity, or the thickness of a fluid. Syrup, for example, has a high viscosity, while water has a low viscosity. The higher the number on the bottle, the thicker the oil. However, the numbers are also temperature dependent.
What does the weight of the oil mean?
The first number in the oil weight represents the oil’s viscosity at 0 degrees F. The lower the first number in an oil’s weight, the thinner it is at low temperatures. Oil that is thinner at cold temperatures is typically better suited for winter driving. The second number, the number after the W, represents oil’s viscosity at 212 degrees F.
Which is more important viscosity of oil or weight?
The higher the viscosity index, the less the change, and generally, higher viscosity indices are preferred. The decrease of the viscosity of a lubricating oil stock with rising temperature is relatively much more significant for a heavy oil than for light oil.
What does the second number on the oil weight mean?
Second Number The second number, the number after the W, represents oil’s viscosity at 212 degrees F. The higher the number, the thicker the oil will stay at high temperatures. Thicker oil at high temperatures is better for summer driving.
What’s the difference between 30 and 50 weight oil?
The higher the number, the thicker or slower flowing it is, which changes the nature of how it coats internal engine components and protects against heat and friction. This means a 30 weight oil flows more quickly than 50 weight oil, but doesn’t offer quite the same level of protection at higher operating temperatures or in stressful conditions.
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 is the best oil for hot weather?
Choose a type of oil that is suited for high-heat cooking, which includes almond oil, palm oil, sunflower oil, hazelnut oil, avocado oil or “light” or refined olive oil.
Which motor oil is thicker?
A 10w-40 motor oil is a thicker oil at startup than a 5w-30 motor oil. Therefore, 10w-40 oil clings to the engine’s moving parts more than the lower viscosity 5w-30 oil.
What viscosity oil to use?
Thinner motor oil with a single viscosity rating of 5 was recommended for winter use, while heavier weight oil with a 30 or 40 viscosity rating was specified for warmer temperatures.