I have an Exmark Z with 23 Kaw on it. Apx 4 years old. Last month oil started misting out around the dipstick and blowing back on the exhaust. First thoughts were I lost something internal, Drained, examined, changed oil and filter, all looked ok. Dipstick looked ok. Ran compression check and had 137 and 123 or so, so felt that was ok. Power is fine, no noticable extra noises. Called Kaw Tech line and they suggested new dipstick, did that and still have the same problem. Anybody have some thoughts? I do not want to pull the engine down without being pretty positive of what I am looking for. Thanks.