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Why does oil pressure gauge fluctuate?

Updated: 12/11/2022
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14y ago

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From the moment you turn on the vehicle, it changes in two ways: 1. When it is cold and the oil is cold and thicker, it needs more pressure to pump the oil through the engine. You will notice a change in the oil pressure at idle when it is cold and at idle after the engine has had a chance to warm up. 2. The higher RPM the engine has to operate in (such as going through speeds 1, 2, 3, OD, or flooring it to pass someone), the more lubrication the engine will need and thus the higher the oil pressure. As soon as the engine slows down, so the oil pressure lowers.

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Q: Why does oil pressure gauge fluctuate?
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