i blew 3 motors due to running 15w40 if its cold where your at i would NOT do this i have this same noise now and my motor has around the same miles 10,xxx since rebuilt was thinking it was the plastic slides i put in instead of metal
![I\'m Down :down:](https://board.marlincrawler.com/Smileys/marlin/down.gif)
but may be main or rod berings due to the steady rmp noise and the rev down noise we are both hearing real faint as well on my part