Yo' man 2 words for you BRAKE CLEANER. goto discount autoparts and get the cheapest brake cleaner which is like 1.25 a can and it works like magic on your engine man seriously. you can spray it anywhere i.e. electrical connections and so on.... but dont mix with oil. For your interior take it to someone for serious stains but if not goto a place like baywash and use there foam / vacuum cleaner.