[PxTx]

I'm still rocking the stockers on my wife's 2000 GMC Yukon 5.3 and sh has 90k on it now. Delco or Wix filters have been my preference.

I changed the plugs stock plugs and wires with Champion OE equals and Autozone house brand wires in my 8100 at 100k and now have 70k on them. Not really what I wanted at the time, but I don't seem to have any problems. Milage did not change from when they were new till now.

I would be surprized if plugs and filters really got you any more MPG on these newer motors. Yeah K&N maybe, but with the dusty environments I get in a regular type filter is easy enough to keep changing as required.