Today I noticed some water vapor and the blackish soot in the exhaust tip. this usually is normal, as I have been told numerous times over the 1 year or so I've owned my '15 ecoboost mustang. But today I noticed some white smoke this morning even after the car was warmed up to normal operating temp. the cylinder head temp stayed around 185. I parked the car after about a 1/3 or 1/2 mile round trip. The car was warmed up already after the 15 mile ride home from work, but I had to run an errand after I got home. I noticed the white smoke after I parked at home, I don't remember the car doing this before but I don't remember for sure. Is this normal or not? Now I'm worried about my car.