My truck uses SOME oil, but not that much. I add about a quart to a quart and a half by about 5000 miles. I change at around 7500 miles. I have also started using Lucas Oil Additive, and it seems to help. I don't have any puddles or anything, so I'm not sure where it's going, I just keep an eye on it and check it a couple times a week.
Are you getting puddles or excessive smoke? Any other signs or indications?
Eric