[JonathanAV95]

I'm having car issues and i'm way pass the due date on my oil change for the diffs. The dealership is charging me about $300 to change it. However, i know i can do it myself. All i need to know is a tutorial and where to find it as well as the amount needed and what recommended oil should i use.
My car is a 2013 subaru wrx (sedan), current mileage is around 75k.
please help me out, thanks !