My 2016 Ford Mustang GT w/Performance Pack has 75,000 miles. Car is tracked 4 to 5 times per year for HPDE. This past year I've noticed when I come in off track, a very small bit of oil drips on my driver side manifold, causing smoke to rise for a few seconds after you pop the hood. Valve cover gaskets were replaced last year. Never any oil on the garage floor. Oil pressure and engine temps seem fine when running. I do push it to 7000 rpm on track here and there but car seems to be running strong. Any ideas? Could it be coming out of the dipstick tube? I do have oil separator cans on the passenger side and driver's side installed.