Motor oil weight explanation

An engine in a colder climate, where motor oil tends to thicken because of lower temperatures, would benefit from 0W or 5W viscosity. A car in Death Valley would need a higher number to keep the oil from thinning out too much. The second number after the "W" indicates the oil's viscosity measured at 212 degrees Fahrenheit (100 degrees Celsius). The two numbers in the 5W-40 indicate the weight or viscosity of the engine oil as tested by SAE. Viscosity is defined as a fluid's resistance to flow: The higher the number, the higher the fluid's resistance to flow, or the thicker the fluid.

In the United States, these numbers are often referred to as the "weight" of a motor oil, and single-grade motor oils are often called "straight-weight" oils. [10] How to know what motor oil weight to use in your car. If this sounds complicated, don’t fret. There’s an easy way to pick the right oil to put into your vehicle: Check your owner’s manual. Look up “oil” in the index, or check the reference section in the back of the manual. There you should find the oil the manufacturer recommends you Originally, motor oils were a single grade, often known as a ‘Monograde’, so it was usual to see a ‘50’s machine having a requirement of SAE 40 oil. Later, multigrade oils were developed and these have two numbers…Something like 20w-50. In these cases the oil performs like one weight of oil at certain temperatures, When oil grades are hyphenated (i.e. 10W-30), this indicates range of viscosity attainable with this particular oil, namely it behaves like 10 weight oil (less viscous) when it is cold or “winter” and thanks to viscosity modifiers (manufacturer added oil additives), it will behave like 30 weight oil (more viscous) when hot. The polymers allow the oil to have different weights at different temperatures. The first number indicates the viscosity of the oil at a cold temperature, while the second number indicates the viscosity at operating temperature. Oil weight, or viscosity, refers to how thick or thin the oil is. The temperature requirements set for oil by the Society of Automotive Engineers (SAE) is 0 degrees F (low) and 210 degrees F (high).

Their initial specification defined five different numbered grades for motor oil (10, 20, 30, 40, and 50). The grades were based on flow rates measured at 210° F ( 

The weight in motor oil describes the viscosity of the oil at certain temperatures. When oil is cold it becomes thick and may not move freely within the engine, and   7 Nov 2018 For automotive gear oils, the specification is referred to as SAE J306. However, this is not the same as the similar SAE system for engine oil  The word viscosity describes how easily an engine oil flows. Here we explain what descriptions like 0W-20 and 5W-40 actually mean. Motor oil viscosity grades and how they are selected. Straight weight petroleum (i.e. SAE 30, SAE 40) thicken a lot as they cool meaning longer time before  5w20 vs 5w30 – Which Grade Motor Oil Should I Use? 6.7L Cummins Engine Specs · Toyota 1UZFE Engine Specs · 351 Windsor Engine Specs.

Motor oil viscosity grades and how they are selected. Straight weight petroleum (i.e. SAE 30, SAE 40) thicken a lot as they cool meaning longer time before 

Valvoline MaxLife motor oil is designed for high mileage vehicles of 75,000 miles or more. However, it is perfectly acceptable to use the high mileage motor oil in new or used vehicles with less than 75,000 miles. If you have a worn out engine and you have been running 30 weight oil or 40 weight oil, then a multi-viscosity oil will not be reliably thick enough to grease the worn out parts of the engine that are wearing down. The best course of action is to switch to a heavier straight weight oil in order to keep the oil thick enough to fill the gaps.

2 Nov 2017 Oil weight is a term used to describe the viscosity of an oil, which means how well it flows at a specific temperature. The Society of Automotive 

A typical summer grade was 30. These oils were straight grade oils. A 10W flows well in cold weather, to protect the engine at start up, but it's is too thin for use  22 May 2018 I just changed the oil in my Nissan Pao last week, and in doing so I was Sometimes this number is referred to as the oil's weight. works for a specific company so she shills a bit) and she gives a good explanation of all this: 

This motor oil's viscosity is measured when the oil is heated to 210 degrees, which is considered to be the approximate automotive engine operating temperature. Based on its resistance range at this temperature, the oil is then graded as SAE 20, 30, 40, 50 or 60; the higher the viscosity, the higher the SAE grade.

Multigrade Engine oil is a lubricating substance used for engines to reduce friction and increase engine lifetime. Why Engine Oils? 16 Jan 2013 Many sportbike mechanics swear by their favorite brand of engine oil with The currently defined SAE grades are 20, 30, 40, 50, and 60. Mixing multi-viscosity 30 weight (e.g. 10W-30) with multi-viscosity 40 weight (e.g.  Oil weight is a term used to describe the viscosity of an oil, which means how well it flows at a specific temperature. The Society of Automotive Engineers (SAE) assigns a viscosity number, or weight, to oil based on its flow at 210 degrees F, which is roughly the standard operating temperature for most motors. The weight in motor oil describes the viscosity of the oil at certain temperatures. When oil is cold it becomes thick and may not move freely within the engine, and when it is hot it may become too thin to offer protection from friction. The first number in the oil weight represents the oil's viscosity at 0 degrees F. How to know what motor oil weight to use in your car. If this sounds complicated, don’t fret. There’s an easy way to pick the right oil to put into your vehicle: Check your owner’s manual. Look up “oil” in the index, or check the reference section in the back of the manual. There you should find the oil the manufacturer recommends you When you see a W on a viscosity rating it means that this oil viscosity has been tested at a Colder temperature. The numbers without the W are all tested at 210° F or 100° C which is considered an approximation of engine operating temperature. In other words, a SAE 30 motor oil is the same viscosity as a 10w-30 or 5W-30 at 210° (100° C). The difference is when the viscosity is tested at a much colder temperature. The viscosity grade (for example, 5W-30) tells you the oil's thickness, or viscosity. A thin oil has a lower number and flows more easily, while thick oils have a higher number and are more resistant to flow. Water has a very low viscosity -- it is thin and flows easily. Honey has a very high viscosity -- it is thick and gooey.

The best engine oils have a viscosity that is neither so high (thick) that it will barely flow or so low (thin) that it will slip through your engine like water. There are two  The weight in motor oil describes the viscosity of the oil at certain temperatures. When oil is cold it becomes thick and may not move freely within the engine, and   7 Nov 2018 For automotive gear oils, the specification is referred to as SAE J306. However, this is not the same as the similar SAE system for engine oil  The word viscosity describes how easily an engine oil flows. Here we explain what descriptions like 0W-20 and 5W-40 actually mean. Motor oil viscosity grades and how they are selected. Straight weight petroleum (i.e. SAE 30, SAE 40) thicken a lot as they cool meaning longer time before  5w20 vs 5w30 – Which Grade Motor Oil Should I Use? 6.7L Cummins Engine Specs · Toyota 1UZFE Engine Specs · 351 Windsor Engine Specs. With high viscosity too much power is required to shear the oil film, and the flow of oil through the engine is retarded. Viscosity tends to decrease as temperature