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Old 01-13-2013, 02:27 PM
MouseFink MouseFink is offline
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Standard idle sped is 650 to 700 RPM in Drive, no matter how much mileage the engine has. If the oil pressure is less than 10 PSI at 700 RPM, it indicates that the engine has worn out main bearings.

The red oil pressure "idiot lights" back in the 1960s were calibrated to illuminate at 7 PSI.
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