Does anybody have any information on engine heaters for the winter? We are looking at a pretty cold February here on LI NY. I work very close to home and my 5.0 finally heats up right about when i'm rolling up to work. I know this is not good for the motor, gas consumption and it is also not fun freezing my butt off for the whole ride. Do any of you guys use them? Are there any particularly good units for my car? How do they work? Thanks for any help.