I have a 06 Mustang GT that is my daily driver. The owners manual says that if the temps fall below like 10 degrees that im to plug in the engine block warmer. Well I finally found the plug on my car, but I need to know if it matters what kind of extention cord to use? Being that it is going to get really cold soon I think im gonna have to plug it in. Last year I didnt do it and I had to get my car pulled apart. Does anyone know if it matters what kind of cord I use?