High wattage surface contact resistance heater

A dual operational electrical resistance heater for use in heating the oil in an oil pan of a vehicle comprising, a pliable body having an inner contact surface and outer surface, a first heating element disposed within said body and having a first wattage density per unit area, a second heating element disposed within said body in overlapping relationship to said first heating element, said second heating element having a second wattage density per unit area which is less than said first wattage density, connector means for connecting said first and second heating elements to a source of electrical power supply, said second heating element being non-thermostatically controlled so as to be continuously energized when said connector means is connected to a source of power supply, thermostat means mounted between said connector means and said first heating element for regulating power to said first heating element whereby when said connector means is connected to the source of electrical power supply said second heating element is activated to provide a continuous source of heat to the oil pan and said first heating element is activated in response to said thermostat means to increase the heat supply to the oil in the oil pan.