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At what temp is 15w-40 oil a 15 weight oil and at what temp is it a 40 weight oil?
Wiki User
∙ 15y ago
This is a tricky question but simple at the same time. 15w-40 oil is never a 40 weight. As you know oil thins as it heats up. What the 15w-40 designation means is that the oil starts out at 15 weight but thins out like a 40 weight as it gets hot (i.e. it stays thicker for a longer period of time). If i could draw you a graph you could see this much plainer. A 5w-30 oil starts out as 5 weight but thins like a 30 weight. Does that make sense?
Wiki User
∙ 15y ago
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In engine oil what is the meaning of 5w 30 or 15w40?
5 and 15 is the weight of oil in cold status while the 30 and 40 is the weight of the oil in operating status.
What does the number before the W mean in 15W40 multigrade oil?
"winter" The oil will act like 15 weight oil in cold weather and 40 weight oil in warm weather.
What does 15w40 mean?
-15 degrees in the winter and 140 degrees in the summer its the measere of temp the oil is made to with stand the w stands for winter
In engine oil what is meaning of15W40?
The W stands for Winter. 15w40 is flows as 15 weight oil in the cold temperatures and 40 weight oil when it gets to full operating temperature.
Oil capacity for 2003 international dt466?
It takes 15 quarts of 15W40 diesel oil I highly recommend Rotella 15W40
What is the difference between 10w40 and 15w40 oil?
15 is thicker oil and for bigger engines.
What is the difference between 15w40 and 10w40 motor oil?
15 is thicker oil and for bigger engines.
Oil capacity for 1997 power stroke ford f350 7.3 liter diesel?
15 quarts of oil are generally oil and filter. its 15W40 diesel oil
Can you use 15-40 oil in a 2004 Mitsubishi galant 6 cylinder?
Can you? Yes. Should you? NO! Use exactly what Mitsubishi recommends and that is not 15w40.
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.
What is the explanation of oil's 15w 40?
That means the oil is 15 weight when cold and 40 weight when hot. The higher the number the thicker the oil.
What weight oil does the HMMWV use?
15-40
