My 2.5L has 145,000 miles on it and uses a couple quarts between 3000mi oil changes. I still beat the crap out of - auto-x, open track days, drag strip. In the past couple years there have been probably half a dozen times that I've had to add 2 quarts to get it up to the normal level. Not ideal, certainly, but the engine keeps running happily along.
'97 Legacy 2.5GT sedan