So I went to Speedy Lube for a quick oil change earlier today. When the guy first removed the filter, he called me over from an exciting moment on the Jerry Springer Show where this poor sod's wife was telling him that she's been stripping and leaving him for a lesbian lover. He showed me my old Mobil 1 oil, and it was completely black! So far I haven't had a single problem with the car, aside from the fact, that it got a little louder (grumbly) recently. So at his suggestion, I paid to have the engine flushed and got it filled with Castrol synthetic.
What could have caused this?
Recently, I'd installed a Samco air inlet hose (replaced the hose between the air filter box and turbo) as well as adjusted the length of my Samco intercooler hose. I'm wondering if one of those little, haning rubber pieces that I saw hanging inside the inlet hose didn't make it's way into the engine. I did remove all the ones I saw, but there may have been one I didn't catch. Could this be the problem? Any suggestions on other causes?