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I have a 1992 Geo prizm in which the low oil pressure light comes on when I come to idle after driving on the highway. Should I suspect a faulty oil pressure sending unit or bad oil pump?
Wiki User
∙ 14y ago
Oil pump, too thin of an oil, or the oil need changing. I run 5/30 in mine, but you may need 10/30. I wouldn't run straight 20, it needs the lighter weight to get all the places it needs to.
Wiki User
∙ 14y ago
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