Seafoam Q.
let the carbon break loose. You are NOT supposed to let it go more then 100 miles without changing the oil. Mine was BLACK as hell when i got done and i only had 400 miles on a fresh change. I will do mine again this year too. My car ran AWESOME afterwards. The more smoke the better too
so in the interest of your car, id advise you only let it idle for a good bit...this will be sufficient

