I have used yamalube at 32:1 for a long time now and have had no issues with oil related failure.  There are a lot of good oils out there and I have read good things about h1r.  927 was the first premix I ever used and never had any issues with it but I heard it didn't do well in cold weather so I switched amsoil and after a short run on that I have stayed with the yamalube and been very happy with it although the castor smelled way better.