This may be an odd question but what amount of oil = does a Vanagon use between oil changes (3000 mi)?

Before rebuilding, mine had 170,000 mi and used 1 = qt. per 500 mi. Now after rebuilding, its using 1 qt. every 2000 mi

This still seems high to me as most Japanese cars use zero oil with a new motor.  Is this Vanagon normal or do I = have a problem?