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The Society of Automotive Engineers (SAE) has established a numerical code system for grading motor oils according to their viscositycharacteristics. SAE viscosity gradings include the following, from low to high viscosity: 0, 5, 10, 15, 20, 25, 30, 40, 50 or 60. The numbers 0, 5, 10, 15 and 25 are suffixed with the letter W, designating they are "winter" or cold-start viscosity, at lower temperature.

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Q: What does W stand for in multi viscosity motor oils?
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How do you make 10w30 out of 15w40 motor oil?

Contrary to popular belief, mixing multi viscosity oils does not give you a set viscosity, only a mixture of several different viscosities.


Can you mix sae30 and sae 10w30 motor oil in a car?

I dont know why you would want to do that. The multi viscosity and straight weight oils wont mix and the multi viscosity oil will be expended faster when it is at its low end. If they happen to reach the correct temperature together, they will flow as united and become the same weight but never be homogenous.


What do you mean by SAE an motor oil?

SAE stands for Society of Automotive Engineers. Sae ratings pertain to the oils Viscosity. Viscosity is the flowability (resistance to flow) at a particular temperature.


Can you use 25w50 oil instead of sae30 oil?

No.First the viscosity is wrong. SAE 30 is a single-grade motor oil. The 30 is a designation of the oil's viscosity grade according to the SAE. The 25W-50 is a multi-grade motor oil, meaning 25 grade viscosity in Winter (hence the "W") and 50 grade viscosity in normal operating conditions. If you wanted to match a multi-grade motor oil in viscosity to a SAE-30 grade oil, then you would need a multi-grade oil that had ended in 30, for example 10W-30.Second, if you have been using a single-grade motor oil, you should not switch to a multi-grade because most single-grade motor oils do not have the detergent additives found in multi-grades. Switching to a multi-grade with a detergent present could suddenly dislodge gunk deposits creating a problem with solids and significantly decreased lubricant performance.Now, with all that being said, if you drive a really old diesel truck and change your oil constantly, then the 25W-50 would probably be a great choice. Since the extreme pressure and heat in old vehicles tends to thins the oil, the high viscosity is probably helpful. And, if you change the oil often, the detergent will do you more good then bad.


What is the viscosity of 15w40 motor oil?

Generally people refer to an oils viscosity by the number after the W In your case the viscosity would be 40. Really both number are a measurement of viscosity. Without getting to involved... the 15 represents how well the oil flows at a cold temperature, also know as an oils winter weight. The 40 indicates how well the oil flows when the oil is hot.


Can you mix different weight motor oils like castrol 10w30 with castrol 20w50?

why would you want to? Yes you could, the viscosity will average out .


What does the w mean in motor oil?

The 'W' stands for WINTER. It does not stand for weight. What would the oil be weighing? 12oz of 10w-30 weighs the same as 12oz of 5w-20. It is related to the cold temperature viscosity of the product. A multi-viscosity oil, 5W-20 for example, will perform like an SAE 5 product when cold and a SAE 20 product when hot. And as a bit of additional info, oils are not 'weighted' they are graded. SAE grades the oil.. SAE 5, 20, 30..


Is there a diff in viscosity between mineral and vegetable oils?

Yes. the viscosity in a mineral will almost certainly wear a hole through your skin. viscosity of vegetable oils will only drown a human baby


Who makes Blain's Farm and Fleet motor oil?

If it is the conventional oil it REALLY does NOT matter who makes it. Most conventional motor oils are the same. With conventional motor oil just use the recomended viscosity and change it often.


Can you mix motor oil viscosities?

Short Answer is Yes but don't mix brands Long answers From the Chevron.com site: "Can I mix different viscosity grades of motor oils?" "Yes. It is always advisable to not mix motor oil brands, however, different viscosity grades of the same brand motor oil are compatible. Be aware that mixing viscosity grades will turn out a product that is different in viscosity than either what was originally in the engine or what was added." From Shell.ca: "If you mix viscosity grades such as a 5W30 low-viscosity oil and a 10W40 higher-viscosity oil, it is reasonable to expect that the resulting product will have viscosity characteristics which are thicker than the 5W30, but thinner than the 10W40. This change does not reflect incompatibility - it's simply a re-balancing of the viscosity characteristics. In all other ways, the product should work as expected. But there's absolutely no danger about incompatibility resulting from mixing engine oils," Miller says. "We've tested all of our grades and brands, and we haven't observed any problems." From Mobil1.com: "For our customers to choose a viscosity grade, we recommend they follow the engine manufacturer's recommendations as indicated in their owner's manual. There is no need to mix two Mobil 1 viscosity grades when one will do; however, we see no problem mixing different SAE grades of Mobil 1 Tri-Synthetic series motor oils."


What is the recommended motor oil for a 1973 super beetle?

In my beetle I run SAE30 oil in winter, SAE40 in summer. I change oild religiously at 3K minle intervals without fail. Aircooleds don't seem to like multi-viscosity oils. If it's below freezing out the SAE20W oil is called for.


What do the numbers mean in motor oil Such as 5-30 or 10-40?

Multi-weight oils (such as 10W-30) are a new invention made possible by adding polymers to oil. 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.For more on this follow the link.Hope This Helps