4.54.5
Next to the oil filter.
5w 30 or 10w 30 will work just fine
Next to the oil filter in front of engine, wire plug on top.
It is located just above the oil filter (located in front of engine under exhaust manifold)
it could be a number of reasons it could be a bad cam your oil pump could be broken or it might be one of your lifters
Excessive internal engine wear? Install a manual gauge the check oil pressure
you may need to replace your gaskets on your valve covers and such, the gaskets are vital to engine pressure
The oil pressure sensor on a Dodge Caliber is under the intake manifold on the front of the engine.
5w30 or 10w30
Erratic oil pressure is usually caused by a bad oil pressure sensor.
Low oil pressure or fluctuating oil pressure.