I notice the oily watery soot in the tailpipes, I believe this is normal. But I've noticed it dripping on the ground, is that normal? I wonder if my fuel isn't quality, or if the soot mixture is just dripping enough it hits the ground? I hope its normal. I don't notice any smoke from the tailpipes or anything, the car seems to run fine, no check engine lights, no noticeable oil lost, I use 91 octane chevron, etc.