I've had excellent results in keeping a dash like new for years, mainly, by keeping it OUT OF THE SUN and using a vinyl conditioner like Lexol or similar quality product. None of my cars, past or present have a cracked dash or any part of the interior cracked or faded, even after 25 years. Use a car cover when parked outside in the sun for hours and a sunshade for short periods of time when you can't find a shady spot.