[lippy]

In past years, the manufacturers would generally consider anything more than 1 qt/1000 mi to be an issue. These days tolerances are better. My daily driver, which is a BMW twin turbo with 113k miles, uses about a half quart per 7,500 miles. My other daily driver, a Chevy Truck, uses the same or less. I think 1 qt/500 mi is a lot and I would try to identify the issue.