You need about 3 liters of Mobil 0w40 synthetic oil. New oil filter.
There is a plug on the belly pan of the sled. Pull that off.
Then there is a oil drain plug on the oil pan of the sled(look through the hole in the belly pan)
Pull the oil plug and drain old oil.
If you have a turbo, take off the intercooler tube, and then put rags or papertowel below where the oil filter sits.
Spin off the oil filter (this might be real hard and some have resorted to driving a screwdriver through the filter to get it off)
After all has drained..
Put in oil pan plug.
Put in belly pan plug.
Spin on new filter, put a little oil on gasket first.
Replace intercooler tube.
Then refil from the top of the motor with 2.5L of oil.
Checking dipstick as you fill.
Then start motor for a second or two, to fill filter.
Top off the oil and recheck the dipstick until it reaches the full line.
It really is very easy and after you do it once, you will be an expert at it.