I've did the groove on a 2007 4.6l and was getting 3more mpg then filled out to register on here and had a question and Ron himself called me and walked me threw the pcv deal now in getting 4 more mpg and have better take off I've only checked it after a half tank.so I've went from 12 to 15mpg the truck has over 202000 thousand miles and seems to be doing a lot better.i love reading the forums for more ideas.again thanks Ron for all your vidios
