Thank You very much, that is what I will do, I was afraid that it was the heads with all the horror stories you hear about the 6.0L, but like I said, there is no real smell to it and it is more unsightly than anything else, would that possibly cause hesitations when you accelerate, or when you get on the fuel at speed? Cause my truck has been doing that, and I thought that it was a fuel filter problem, but now I am unsure..