I mentioned awhile back, that our 02 Corolla, which we bought used in May of
2010 with 114k on it, was using a bunch of oil. Well after observing it over time, and no one can find any leaks, I also noticed it uses more in winter than in summer. ( Denver area ) Last winter it was using a quart about every 800 miles and this summer ( faster warmup ) it's using about a quart every 1600 miles.Does that help pinpoint what may be the cause?