Red Beast

yesterday i was talking to my freind who likes to think he knows things about cars (he drives a jeep) and he told me he just picked his bros mustang up from a "tune". i said, "o nice, how much hp and tq he get from it? what octane he runnin now?" and he responded "lol, no bro, thats not a tune, and hes still runnin 89" and i responded, "o, do u mean u got him a tune-up? i thought u ment a tune from like brenspeed or bamachip or sct..." and he responded "no, those are stupid, they dont do ****, all they do is cut the life of ur engine in half... my freind who builds engines told me that" and i just felt like slapping him... anyways, i like to prove people wrong, so can somebody show me there dyno results from before and after a tune?
Thnx guys.