The process is relatively easy to do. I think it is important to "flush" out all the old "crud, gunk, build-up"; whatever you want to call it, before installing the nice clean Amsoil. Here's the easy process:

1. Before you start, have on hand - Amsoil engine flush, Amsoil SDF Oil Filter, Amsoil Oil, a cheap new filter (I used NAPA Gold Oil Filter) & rags
2. drive around for 15 min to get everything warmed up
3. Park the car up on ramps
4. Remove the old oil filter (be careful, it and the oil is very hot) - allow to drain slightly from the filter area.
5. Install the cheap new filter (not the Amsoil SDF!!)
6. Add Amsoil Engine Flush via the Oil fill cap, back off the ramps and allow to run for the suggested 20min @ idle.
7. When done put car back up on ramps
8. Remove the Oil Filler Cap, remove the oil drain plug & drain old fluid, remove "cheap new filter" (now filled with "crud, gunk, build-up")
9. I would suggest draining the oil cooler as well - I refer you to Bay 13 on Volvospeed.com for instructions - it is really easy. Besides no reason to mix the dirty oil remaining in there with the new stuff your putting in.
10. Hook up oil cooler again, install Amsoil SDF oil filter, replace oil plug and torque to correct value
11. Pour in 5 qts of New Amsoil Oil - reverse car off ramps - allow to sit - then check oil level - add to correct level (approx 7 qts)
12. Take old oil to Autozone for recycling (PLEASE!!!)

You're done!!

Best of Luck Andrew T. Watson