Join Date: Nov 2010
Thanked 22 Times in 13 Posts
I run 16 oz in my '07 every other tank, don't notice any mileage difference but it's a little quieter.
Ran 16 oz in my folks' '01 power stroke this past weekend. Just going by their over head (liar meter) which is normally very accurate I picked up about 4 miles per gallon empty and about the same pulling a 40 ft living qtr. horse trailer.
Same trip, about the same wind conditions were made a few weeks ago with the truck. Didn't hand calculate, but I do know we needed to fuel up before and I made it on one tank before this time.
Fuel came from the same place both times, only thing different was the addition of some Wally's two stroke????
2007 2500 Quad Cab 5.9