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It can be caused by using an oil that is too light (low viscosity number) for the age of the engine, or it can be caused by sludge buildup on the oil pickup screen in the crankshaft, or a worn or damaged oil pump or a faulty oil pressure sender unit. If the engine is just plain worn out, and the oil pressure has dropped because rod and/or main bearings are excessively worn, the only choice is thicker oil (higher viscosity number) or a replacment or rebuilt engine.

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โˆ™ 2005-11-15 15:32:07
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Q: What would cause oil pressure to drop in a 1989 Cutlass Ciera?
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