I've heard some of the negative, mainly for boats and such...
BUT...
Anybody else, noticing significant gains in their MPG.. my truck I noticed is a little better (150 with the 4.6) around town, and that's even with a coupla beach runs!..., but, my wifes Expedition with the 5.4... took a big jump, esp. around town, and believe me, she don't drive for mileage
...
Anbody else
