Yea both my engines burn/ed almost no oil. Second long block has same noise after oil change. Dealership blamed canister purge valve. I can't see that being the problem, but I had them do the work. I'll drive the car more to see if it worked. I really doubt it will. My guess, as others have said here and elsewhere, is they drove the piss out the car until the noise was less noticeable, and it will be just as strong as ever when I change the oil next.