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The bearings are going bad. Try a slightly heavier oil. If you've been using 10 W 30, try 15 W 40 or something heavier than what you've been using. You can often squeeze a little more life out of an engine by trying that. Keeping good, fresh oil in the engine can help bearings and cylinders last longer. Old oil becomes gummy and thick and results in bearing wear. IF oil is kept changed and full, babbit bearings can last almost indefinitely.

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โˆ™ 2006-03-28 16:31:43
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Q: What could cause the oil pressure to drop from 40 pounds to under 20 when engine is warm on a 1986 Ford F-150?
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A worn out, tired, high mileage or abused engine could cause low oil pressure.


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