However, this is just a range. You should consult your specific Buick's owner's manual for the exact recommended oil pressure specifications. The year and model of your Buick will significantly impact the precise figures. Factors like engine wear and oil viscosity also play a role.
Low oil pressure (below 10 PSI at idle or consistently below the recommended range) is a serious issue and requires immediate attention to prevent engine damage. High oil pressure (consistently above the recommended range) can also indicate a problem.
Always refer to your owner's manual for the most accurate and reliable information regarding your specific vehicle.