You should change the oil every 3 months of 3000 miles.
Oil change is due.
Yes.
125 p s i
5w30
This WEBSITE has the answers as well as pictures and a step by step: http://theswampbbs.com/300m/plugchange/default.html
A block heater was not standard equipment on a 2001 Chrysler 300m.
4.5 quarts
Carefully remove the lens then bulb
5 to 5.5 quarts
Only when it fails. 250,000 miles would be average.
If the rear light of a Chrysler 300m does not turn on after replacing the bulb, a fuse may be blown. Replacing the fuse should fix it.
A Chrysler 300M uses ATF+4 transmission fluid.