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Why Oil pressure low 20lbs at highway speeds in 1993 Jeep Grand Cherokee with 85000 miles 10w-30 oil?

Updated: 12/12/2022

Wiki User

∙ 15y ago

Best Answer

Try either a manual gauge or replacing oil sending unit If pressure still low excessive engine wear, bad oil pump pressure relief valve stuck open i have a 93 jgc and had the same problem. try changing to thicer oil. im using 10w-40 now and its fine

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∙ 15y ago

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Q: Why Oil pressure low 20lbs at highway speeds in 1993 Jeep Grand Cherokee with 85000 miles 10w-30 oil?

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