08-11-2015, 12:48 PM
Hmm. Is it possible you drove over some oil on the highway that misted onto your car. Unless the car is covered in oil (I had that happen once when an oil line broke) there is unlikely to be harm in going further down the road to see if the spots are a one-off or an ongoing problem.
Jon Kabbe
1993 coach 337 with Civic towed