carryon525
Member
- Joined
- Feb 22, 2016
- Messages
- 131
So I was letting my car idle for a little bit in the garage. I have noticed that the garage floor gets black. So I touched it with my finger and I know it is not oil but it does feel kind of like charcoal. What do I need to do to get rid of this and could this be the major cause of some of my knock that I am getting. I ordered the alcohol injection kit so that will be going on the car soon. Can someone help?