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| Declutch |
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This is when the clutch pedal is employed and so the transmission is disconnected.
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| Degree of viscosity S.A.E. |
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The S.A.E. (Society Automotive Engineers) is the American technical nomenclature used for oils to determine its viscosity. There are two criteria used: those with the letter W (winter) whose properties have been determined at 18� below zero. and those that take the initials S.A.E.. made at 100� above zero. So. a S.A.E. 30W oil indicates that its viscosity is 30 on the 18� below zero scale and a S.A.E. 60 has a viscosity 60 on the 100� scale. In a combined nomenclature (for example S.A.E. 30W60) we find multigrade oils that maintain their properties at different temperatures.
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| Density |
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Relationship between the weight of an element and the volume that it occupies. A denser body indicates that its weight is bigger in relation to a certain unit volume.
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