It dissolves tough oil-based spots like grease, oil, tar, dried oil-based paint, lipstick & nail polish, some inks and adhesives. Easily rinses with water, less hazardous formula for use with carpet & upholstery. Diesel fuel removes tar without damaging the surface. Put on protective gloves and dip a rag into the diesel fuel. Wipe it on the spot and let it set for a minute. Wipe the tar and fuel off. Use a soft cloth to ensure there is no damage to the car. Seconding put a bit of White Spirit onto a cloth and work it on to the tar leaving it to rest for up to about 5 minutes or so. Once the time has passed use a cloth to easily remove the tar away.