Report "Scraping sound when turn on air conditioning, then will make scraping noise every couple of minutes while AC running. If the AC isn't on, then there is no noise. Also, my car has an oil leak. The undercarriage is covered in sludge, and also has a few spots that have fresh oil hanging off of some bolts. There are no oil spots on the ground from being parked for hours, or any while driving. I am having to add at least a quart a week to keep the light from turning on, or to have some showing on the dipstick"