My 039 chainsaw died today. The obituary is as follows. Purchased used with unknown number of hours approximately six years ago. Used heavily to fell and cut up hundreds of trees. Initially used Amsoil synthetic 2 cycle mix and then switched back to regular Stihl 2 cycle mix. Always known for its reliable service, although compression was known to occasionally buck like hell. Always started fine, even in very cold weather. Once had a huge limb fall on it and cracked the housing, it continued to function just fine. Cause of death believed to be complete lack of compression due to overheating scored/ cracked cylinder and burned valves. Saw died cutting up very large, tough white oak logs approximately 4' diameter. May you rest in peace, you served me well. Stihl 039 for sale- Cheap!!!