How long, on average, do Oscars live?

my first oscar lasted for 7 years but that was not in accordance with
the correct fish keeping. i had him at 35 gal tank for that long and
reach 12 inches only. based on the oscar review, they could live 15 to
20 years in captivity.....(aquarium). i am not sure about in the wild.

i have heard 30 yrs... well at least i dont have to worry bout havin my fish till im 50 now, only 40 or so....lol

would you believe that gold fish could live more than 30 years
in captivity. i have seen one a year ago and it weighs 5 kgs at
32 years old. the owner had built a big concrete tank for it.

i think i heard at many places 15 years

thank you all for your replies.