There are some items in your kitchen that may be successful in removing tar. Butter, creamy peanut butter, baking soda, or vegetable oil applied to the tar and left for 12 to 24 hours should soften in and make it easier to remove. If that doesn’t work there are a few items from the garage that may work. WD-40, kerosene, or mineral spirits applied directly to the tar should soften it up and make it easier to remove. WD-40, kerosene, or mineral spirits will most likely remove wax from your car as well.