That doesn't make sense tho. If it would have burned that much oil after 5 miles, think what it would have been like after 1,000 miles. It would be like 200 of those. That is more oil than the engine holds probably. How much was it using before the separator was put on. If it didn't use at least a quart every 200-300 miles then that means the install on the separator is wrong. Remember that what that thing catches is saved from being burned. It would have disappeared if not for it. Did you add that much oil every 5 miles before?