OK guys, this may be just a fluke, but....
Last week I installed a K&N Air Filter on my 07 F-150 (5.4 w/3.55 axle, tow package) I filled up a few days later and today I calculated my MPG on the first tank of gas.
Whereas before I was getting 16.4 mpg on my daily commute my calculation says I got 19.48 on this tank. That's 3 mpg. That's outstanding. And that's just the filter, not the intake kit.
So now I'm thinking, is this a
, or a
, or a
I'll make a few more calculations over the next few weeks and let you know.