Quote:
Originally Posted by green 4 acres
it's someones silly scheme to change the phrasing ... in the 80's they wanted to talk summer -winter oil
engineering dept.s do not say..." hey give me that 20 winter oil" .
the specific gravity of oil is what differentiates the oil conditions is what is being talked about here ,
10 weight oil is lighter than 20 weight oil
10W40 a variable viscosity oil is supposed to have the propertys of a 10weight oil, when cold and 40 weight when hot
how Winter enters the picture ???
what is winter ? I don't know 3 billion people do not have it ,
you know the tropics , but they have engines and used oil
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You don't usually see this "W" in single viscosity oil marked on your oil containers, do you? Such as SAE 30 oil. So we buy the right
WEIGHT oil for our Kohlers in the winter.....and I use 10W(Winter)30 in my tractor. Or SAE 30 for the summer.