So heres the skinny I just had my old engine combined with a newer engine both had wear but between the two I got a good one. When we first got it going on fresh oil we ran it for ten minutes and check the oil and Yak it was a nasty contoxion of black and yellow crud so new filter new oil. At this point we were using Vavoline SAE-10w-40 then I took it out for around 30 miles and checked it. Black as ever with a murky brown mixed in still on Valvoline SAE-10w-40. So at this point since both engine had been sitting awhile we decide to up the anti a bit and took it to Valvoline SAE-50 figuring a heavier weight oil should help both get the engine back to clean and mean worked great took it to Ohio and back but it was black and murky again not nearly as back as the last few times though. Then I went up another bump this time to Harley SAE-60 to try and get everything greased and smooth again. I understand that with the heavier oil i need to run it in higher temp areas and when i start it I'll need to really let it warm up before i take off which i do but my question is to the experts here am I hurting anything running a heavier oil and should any of the above things cause me trouble as I really don't fully trust mechanics because of the whole profit money making ventures. So far since I did the SAE-60 it seems to pur like a kitten minus the whole valve ticky noise which I'll work on next.