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more about oil?

Discussion in 'The Garage' started by MJB774X, Jan 27, 2003.

  1. MJB774X

    MJB774X 1/2 ton status

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    I was told by my auto shop teacher back in highschool that, ex. 10w30 means the oil slosh's like 10 weight oil but has the shear strength or load ability of 30 weight oil, the other day I was discussing this with a friend who is younger and had the same teacher, he said that he was told the w means winterized? I wonder if the teacher learned something new after I was there? does anyone know what 10w30 really means? /forums/images/graemlins/usaflag.gif
     
  2. heavy4x4

    heavy4x4 1/2 ton status

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    It means that at cold temperatures, the oil acts like a "thin" 10 weight oil. Then, when it warms up, it acts like a 30 weight oil.
    For lawnmower engines and other seasonal engines, use straight-weight 30. The thinner 10 weight isn't necessary because you don't have the cold starts like you do in vehicles because they aren't run year-round.
     

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