* At idle (around 600-800 RPM): You should see at least 10-15 PSI. Some slight variation is normal.
* At operating temperature (around 2000 RPM): You should see 30-40 PSI.
Crucially: These are *approximate* ranges. Your owner's manual will provide the most accurate specifications for your specific vehicle. Always consult your owner's manual for the manufacturer's recommended oil pressure ranges.
Low oil pressure is a serious issue and indicates potential engine damage. If your oil pressure is consistently low, even within the ranges above, or if you experience fluctuations or a sudden drop, have your vehicle inspected by a mechanic immediately. Don't drive it until it's checked.