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What viscosity is 10W30?
The 10W30 designation on engine oil means that the viscosity of the oil is rated at 10W when an engine is cold and 30 when the engine is hot. This is different than an oil labelled 5W30, which has a thinner viscosity when the engine is cold at 5W.
Is 10W30 multi viscosity?
A 10W-30 is a multi-grade (two viscosities) motor oil, and as the name implies, it meets more than one grade. Forty years ago, there were winter grades for cold weather and summer grades for warmer weather.
What is the viscosity of 10W oil?
4.1
Automotive Lubricant Viscosity Grades: Engine Oils – SAE J 300, Dec. 1999
| SAE Viscosity Grade[°C] | Min. Viscosity [mm²/s] at 100 °C | High Shear Rate Viscosity [mPa.s] at 150 °C |
|---|---|---|
| 10W | 4.1 | — |
| 15W | 5.6 | — |
| 20 | 5.6 | 2.6 |
| 20W | 5.6 | — |
Is 10W30 thick?
10w30 is thicker than 5w30 because it has a higher viscosity in low temperatures. The engine oil will flow slower than 5w30 during the cold season. Thicker or higher viscosity metal oil has a better seal compared to low viscosity oil. Thicker oil offers better lubrication of motor and engine parts.
What happens if I use 10W40 instead of 10W30?
The basic fact that “40” is greater than “30” tells you that. If you were to put 10W40 in an engine designed for 10W30, the “thicker” oil would lead to friction in the engine and an increased load on the oil pump. The car would have to do more work to get the oil around the engine block.
Should I use 10W30 or 10W40?
Ambient Temperature Between a 10W-30 and 10W-40, 10W30 motor oil would run smoother in colder climates while a 10W40 would be more effective in preventing engine wear and tear in warmer temperatures.
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 do oil viscosity numbers mean?
The term “viscosity” refers to the thickness of the oil and its resistance to flow . A higher oil viscosity number indicates a thicker oil. Where this is vitally important is in an engine’s bearing clearances.
What is motor oil viscosity?
Motor oil viscosity is generally known as a measurement of thickness. But more specifically, viscosity determines an oil’s resistance to flowing in liquid form as well as its resistance to shearing (breaking down) as it’s slammed around inside an engine.