1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Coefficient of Viscosity

  1. Sep 9, 2012 #1
    How do I tell what the coefficient of viscosity is of SAE 10W-30 oil? It is at 25 degrees C. My book says that multigrade oils like this have a non newtonian blending additive. This doesn't mean I have to treat the substance as non newtonian does it?

    Any help would be appreciated.
     
  2. jcsd
  3. Sep 10, 2012 #2

    CWatters

    User Avatar
    Science Advisor
    Homework Helper

    Google found this chart but I don't know the source of the data..

    M1vsAmsoil.jpg
     
  4. Sep 10, 2012 #3

    CWatters

    User Avatar
    Science Advisor
    Homework Helper

    Looks like the viscosity is only specified at a few temperature points and those can vary depending on the grade. Scroll down...

    http://www.tribology-abc.com/abc/viscosity.htm
     
  5. Sep 10, 2012 #4

    CWatters

    User Avatar
    Science Advisor
    Homework Helper

    I suspect it depends on what experiment you have planned. Presumably the additive makes the oil thicker when under pressure in bearings etc, while at the same time makes it easy to pump around the engine.

    If you are doing simple lab experiments dropping balls into oils or something then you might be ok. If you are doing something more exotic beware...

    http://en.wikipedia.org/wiki/Motor_oil

     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Coefficient of Viscosity
Loading...