First of all, look for the car manual with the lubrication model of the door hinge on it. If not, you can choose fully synthetic lubricating silicone grease. At present, the new car loaded by Volkswagen is made of tiger head hotolube or Krupp, which is colorless, transparent, low temperature resistant, durable and has safety certification. Taobao has130g toothpaste tube, which can be used for four doors and seat slide rails.
However, these places are not suitable for using lubricating oil or ordinary butter, which is easy to lose or freeze at low temperature and has harmful odor.