So I had my Blaster at my friend's house on the weakened and my Blaster started running weird but I had put different gas in then usual so I thought that's what it was and ignored it. When I went to load it on my trailer it was making a knocking noise. So today I tried to figure out what that noise was and found it had no oil in the crankcase (I knew it had a small leak). So I filled it up and ran it for a minute and there was no knocking and I looked under it and there was a big pile of oil on the ground leaking out and then it started knocking again. When you rev it a little the knocking goes away. I'm going to order the oil block off kit because it comes with the gasket I need to stop the leak (there is silicon in place of the gasket now). I figure I ran it for about 30-60 min. with no oil in it. My question is what would it have hurt running it without oil?