what is the normal oil pressure for a 2006 1.6L Chevy Aveo LS?

THERE IS SERVICE BULIITENS OUT ON THAT PROBLEM. CHECK THEM OUT IT IS NOT JUST AS SIMPLE AS CHECKING PRESSURE I THINK NORMAL PRESSURE IS 80 BUT THERE IS SOMETHING ELSE WRONG A OIL PUMP JUST PUMPS RESTRICTION CAUSES PRESURE. i HOPE THE PREVIOUS OWNER USED THE CORRECT VISCOSITY OIL. CHANGING WHAT THE MANUFACTER RECOMMENDS IS NOT A GOOD IDEA

Not knowing how many miles are on the vehicle makes it a bit more challenging. But there are some basic guidelines that still apply. The oil light turns on when the viscosity drops too much and the engine can't maintain oil pressure to safely protect the engine at idle. Typically this occurs at about 7-12 PSI (buy a service book such as Haynes for your car' specs.). It's apparent there is a problem if the light is flickering; engine noise indicates damage is occuring. It if turns off when revved up (and the noise subsides), then the sensor should be working okay. If you have an oil pressure gauge laying around then verify pressures, but wouldn't bother paying to have it done (yet). Typically the issues can be a bit expensive to fix: worn engine bearings and worn oil pump. Be sure to check for any dealer recalls or service bulletins for the problem. The cheap fix is to try a different oil. A full synthetic will be more heat stable and won't lose viscosity much less than regular oil. Try a thicker viscosity: for example, instead of a 0-20, use a 10-30 or even 15-40. If you use 20-50 or 30 weight and it doesn't go away then the damage is likely too severe. Note: Using very thick non-synthetic oil in winter can cause dry startup which will be noticed with excessive valvetrain noise (lifters); should subside in less than 10 seconds (DO NOT rev the engine to "help" it). The best luck I've had doing this is with Amsoil brand lube (www.oiloregon.com). If the car is under warranty then disregard this and get it correctly repaired. Also: If the engine is knocking when hot and the oil light is on and won't go away when revved (2-3K/rpm should suffice)with thicker oil, then stop driving it before it's not cost effective to repair due to excessive damage. You can assess how the engine was cared for by removing the oil cap and looking for excessive varnish or sludge buildup. Sometimes it's not possible due to cam baffles-- instead look at the cap's underside to check. I ALWAYS recommend ANY used car be thoroughly checked out prior to purchase, preferably by an ASE Master Technician with many years of experience. It could save a person thousands of dollars. Based on prior experience the symptoms mentioned are not positive, especially for the long term outlook, sorry. Good luck.

What the oil pressure is is not relevant. You clearly are losing oil pressure. STOP DRIVING THIS CAR! have it checked out by a professional or you will be buying another car or engine.

Should be above 10 psi at idle, then 10 more psi per thousand RPM.