Most types of lubricant, including motor oil, will not harm the paint on a car. Oil will make a slimy mess and cause ugly streaking, but it won't damage the vehicle. But if the oil gets onto the driver's clothing from brushing against the car, it may result in a far more complicated mess. Removing oil from car paint requires a degreasing product that can be as simple as liquid dish washing detergent. Clean cloths and elbow grease will finish the job.
Blot away as much oil as possible using paper towels. Don't wipe the spill or smear it around, which will only create a bigger mess.
Pour 1/2 cup of degreasing liquid onto a clean towel and apply the liquid to the oil on the paint, rubbing gently over the oil spot and letting the detergent set for 15 to 20 minutes.
Wipe off the degreasing liquid and oil with old, clean towels, repeating as necessary to remove all traces of oil.
Wash and wax the automobile to bring out the shine in the paint.
Do not leave the car in direct sunlight on a hot day when using degreaser on oil, as this could cause the paint to fade or discolour.