Whats average consumption per 1000 miles for a coupe? I recently read an article in Automobile Magazine about a long-term test they ran on a ZO6. The piston rings had to be replaced because of excessive consumption. Ive added about 2 quarts in 3500 miles since I bought my '00 coupe 2 months ago. Is this considered normal? Does the Z06 tend to use more oil?