I have a 98 Mustang GT with about 126,000 miles. I have always been using Valvoline Max life oil for cars with higher mileage and it was fine. I would always go to Express Oil Change to get my oil changed. I got into a crunch once where I had to go to this place called Precision Tune and get my oil changed..it was alot cheaper, so it worked out. Well, now in the mornings when I only drive a couple of miles, I can see smoke coming from my hood ....not a whole lot though..but enough to notice. But after I drive 20 or so miles, and come to a stop, the smoke is gone. What does this sound like? Is this possibly related to the oil I changed to that one time? I also have a minor coolant leak. Let me know what you guys think.