Thursday, January 7, 2010

What is the difference is the different weights of motor oil?

Like 10W30, 10W40, AND 5W40?What is the difference is the different weights of motor oil?
Basically it's how thick oil starts out as an how think it will get once heated.





For example, if you use 20W50, it means that it will start at a thinkness of 50 and ';thin'; down to a thickness of 20. Compare this this to 10W30, starts at 30 and goes down to 10.





90W gear oil for example doesn't change (I could be wrong here), it just stays at 90W.





For a very detailed description, check wikipedia...





http://en.wikipedia.org/wiki/Motor_oil#G鈥?/a>What is the difference is the different weights of motor oil?
They are called viscosity (thickness). You don't have to know much more than - just stick with the factory recommendation.





Here's more if you really want to know





http://www.carbibles.com/engineoil_bible鈥?/a>


http://www.nordicgroup.us/oil.htm








Good Luck...
Light weight oil or 5W is good for easy starting and 40W is good for longer driving and older well broken in cars. As you drive the temperature of the oil heats up and the oil will get thinner.
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