Im pretty sure I have a oil leak, main reason for me coming to this conclusion is cuz I have a bunch of oil all underneath my car, I lost 1 quart of oil in about the last 2-3 weeks, my rear wagon door has oil on it, and the driveway is has oil drip marks. I think its comming from the turbo return line cuz thats where there seems to be a lot of oil. Does it usually spray out oil that hard to get it all over the rear of the car? I dont see any smoke while driving tho. I checked it today and it doesnt seem to be loose so maybe its a seal? am I right? or could it be something else? if its the seal to the return line, how do I fix it?

Also, while trying to troubleshoot it, I heard something that if u unscrew ur oil filler cap while ur engine is at idle and while its sitting there it rattles, that means u have too much positive pressure. How do u fix that? could that be why Im loosing oil? thanx in advanced