If anyone has any tips around here that would be great. This is for my fathers car and he does not want anyone to touch the. I am new to this forum I usually roam the AudiWorld forums. I think you guys have a good site here. Any help or instructions would be great this will be my first time under a subaru

Couldn't be easier. Crawl under the front of the car with an oil drain pan, a large box end wrench (19mm I think) and your new filter. Drain oil, replace filter, reinstall plug, refill with 4.5 qts. of synthetic 10w30 goodness, and enjoy.