Is there general agreement on what is the best lubricant for areas such as door hinges and also hood hinges and rear cargo hatch hinges? We just got a VW Tiguan and so my question is specifically directed to this vehicle, but I can't imagine how the general principle would be different if it were some other vehicle. The dealer suggested silicone. Is he correct? If he is, is there any brand or type that would be best for door hinges? Thanks in advance for help with this.