Greg, no sweat...all I know is that changing the engine air filter is a heck of a lot easier.
I only had 6K miles on my filter and it looked like it could easily go for another 10K miles (and I use the a/c and heat all the time depending on the weather)...I did change it out since it was a bit of an ordeal.
2006 Mustang GT Premium, Windveil Blue, Light Graphite Leather, Auto, Shaker 500, IUP
2006 Mustang GT
2002 Nissan Maxima
2001 Corvette Coupe
2001 Chevy Blazer