[RKDinOKC]

Talked to an old mechanic dude about the gasoline heaters that used to even come on Porsches. Was asking about the gasoline heater option available on all the Cayennes, though I've never actually seen one in the wild. Discusses it in my manual. He said he hoped they were made from better materials as they were always having to replace the older ones because they corroded themselves from the heat they created. The gasoline heater is supposed to work as long as you have more than 1/4 tank of gas.

My Cayenne has a REST feature. You can turn it on after you remove the key. It runs the water circulation, heater blowers, and thermostat as long as the block water is warmer than the interior of the Cayenne. Use it to keep the Cayenne warm while getting groceries when it's cold out. Haven't actually looked if was still on when getting back almost and hour later, but do notice it is still warm. Though not much of a test will try it at lunch today. Turn it on and see if it still going when I get back from eatin.