[whatsnewell]

This is, and has been an interesting discussion. When I first purchased my coach in March of 2008 I only engaged the Jake when I knew a steep downhill was coming, but, otherwise, left the switch in the "OFF" position. After many discussions with other seasoned Newell owners I now leave it on all the time unless I am on a long stretch of flat, open highway where "free wheeling" makes more sense. I like the extra breaking power, especially when in city, stop and go traffic. If that little edge of safety costs me a few cents per mile so be it. I haven't really noticed any measurable difference in mileage which comports more with Russ' analysis, but again, for me the safety margin gained outways the extra fuel cost. That's my 2 cents and I'm sticking to it.