Yes.
Yes.Yes.
Mopar 5281090
5w20
No. You can use conventional, synthetic, or a blend.
A Chrysler 3.6L can use synthetic, conventional, or a blend. 2011 and 2012 use 5W30. 2013 through 2016 use 5W20.
Yes, that is the correct oil.
If you use conventional oil then I recommend you change the oil/filter every 5,000 miles. If you use synthetic then change it every 8,000 miles.
5.7 litres
It is on the bottom of the engine.
It is on the passenger side of the oil pan.
The 2005 Chrysler 300 runs on regular unleaded.