Yep, also, one day a buddy of mine's dad took his truck to a Jiffy Lube out here to "test" out a rumor or something he heard. His dad used to race modifieds and is also an engine builder for a military company on Ft. Carson as well so he def knows his stuff. He went in acting like he didn't know anything from anything.
Well after the "oil and filter change" he took it home.....same oil filter was on it. Drained the oil....black as black can be. They didn't touch anything on it!
So, he went back, took his old filter up there and had a hayday. They apologized and said something like they must've gotten the vehicles mixed up or something like that. Ended up getting his money back and confirmed the suspicions he'd heard.