Originally Posted By: crazyoildude
There is a pure one air filter in there now but i feel it is a little restrictive because at full throttle it seems a little bogged down although the oil is always super clean so it must be filtering really well maybe to well.
I was thinking Motorcraft or maybe even fram what does everyone else use in the 4.6 fords?
It's hard to believe that your "seat-o-meter" is really giving good info as to how well your air filter is working ...
If it's truly "bogged down" then it's time to change. But to really know if this is true, you need to install a restriction gage; they are cheap from any source all over the net as well as can be ordered at any parts store. But to be "bogged down" there would have to be a SIGNIFICANT load in the filter, to a point where it would be considered negligence IMO. And, if it's dragging power down that much, you'd better change it ASAP because the filter will be compromised VERY soon by deformation or such.
I've used Purolator and Frams in my 4.6L 2005 and 2007 MGM. Never had an issue with them, and I let them go well past their "30,000" mile change because they are no where near loaded in my area at that duration.