01-10-2011, 09:02 PM
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#7 (permalink)
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A True Z Fanatic
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Quote:
Originally Posted by ImportConvert
I am disagreeing with the way you say "running the engine with 5-weight oil".
That is deceptive in that the oil is very thick when cold. cSt of most "X"-30 weight oils is around 60 when cold. When you heat them up, the cSt drops to around 9-11.
The way you presented it makes it sound like oil is thinner when its cold.
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I apologize if my comment caused confusion. I meant it behaves as a cold 5W oil, giving it a (slightly) higher viscosity. I guess I should have fleshed that comment out more.
Not sure where you get the 60cSt number. It's usually below 20, at least for a 5W oil.
Viscosity Charts
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