As some of you know I recently acquired a 66 E model. Sunday I flew it from KOWP to 58M which ended up being two stops and about 8 to 8.5 hours of flight time. Prior to flight I checked the oil and it was at 6 quarts. Yesterday I went to the airport to do some pattern work and checked the oil in preflight and it was just a touch below 4. There was some oil below the air intake and down the underside of the engine cowling. I'm wondering if this rate is normal for a long cross country, and ma