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Why would the oil pressure gradually decrease after a 1992 Buick Roadmaster has been running for a while but pressure maintain while driving?


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Wiki User
2005-01-06 07:48:48
2005-01-06 07:48:48

Especially if you are in cold areas, it takes more pressure to circulate cold oil. When it warms up, the oil flows easier through the system reducing pressure.

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A decrease in pressure decrease the boiling point.

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If the flow is subsonic the pressure will increase, if however it is supersonic the pressure will decrease.

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if pressure increases temperature increases if pressure decreases temperature decrease

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Arterioles can increase and decrease their resistance in response to changes in cardiac output in order to maintain blood pressure. Increased cardiac output will cause arterioles to correspondingly decrease their resistance (thus increasing their compliance) so blood pressure remains unchanged.


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