I have a 1999 Isuzu Trooper S which has been burning oil at a rate of approximately 1 Qt for every 700 miles. I first noticed this when the vehicle oil light came on a about 20,000 miles and I had to replace of 4 quarts of oil. Since then I've had rings replaced with no significant improvement and have been back and forth to the dealer more times than I can count. I should have checked the web earlier for similar stories but I now waking up to this. I'm now at 48k miles and out of warranty due to age.
The dealer is just now fessing up to the fact that this is a known problem. If I had known earlier I would have stopped hitting my head against the wall.