I can't believe you can't see the benefits. Especially and cold days it takes the car longer to warm up. Think about it. You start your car and by the time you get to it...the car is warmed up and the inside of the car is warm. Sure I could get in the car, start it, and wait a few minutes for it to warm up. Or I can start it from my office, get more work done (or TT.net surfing), then go to my car and drive away. Preventative maintence as far as I'm concerned.