If you are wondering what the sensors on the oil filter housing are for, take a look at this contraption:
The oil pump used in the Pentastar (3.6L V6) engine is a two-stage design (the volume of oil pumped is not based on pump speed). The displacement of the pump is not fixed; rather, it has a variable displacement capability.
Low pressure mode regulation (solenoid on) is approximately 200 kPa (29 psi) and high-pressure mode regulation (solenoid off) is approximately 450 kPa (65 psi). The Powertrain Control Module (PCM) switches the pump between stages based on engine operating conditions, oil and coolant temperatures, speed and load. Under most typical conditions, the pump will run in low mode from idle up to around 3,000 RPM, and switch from low to high mode between 3,000 and 4,000 RPM.