RE: Etc. Power?
Thats called your overdrive. I normally drive with it on, the only time I disengage it is when im going downhill and I want to maintain a certain speed. Driving with the overdrive on not only gives you more power, but when driving freeway speeds it helps fuel efficiecy as well. hope this helps.
Why rule the world with an iron fist, when you could rule it with a led foot?