Just observing after following this thread from the beginning. Sir, you have asked for a lot of advice here and have gotten it. Some of it you used, some of it you didn't. I realize it is harder to get parts etc. where you are and has made some things difficult to do. But, you say your engine is doing good and you seem very happy. So why wouldn't you take the advice from several guys on here that tell you to stay with 10w30 to keep your engine alive and going strong for a long time?