i think someone should save the oil the catch can collects and show the amount after 10k miles, 20k miles etc just to give a visual representation of how much oil was prevented from gumming up the intake.
there are a lot of people claiming that a catch can is a scam or not necessary but let's put it this way, there are millions of other "useless" mods that cost A LOT more than one of these.
that being said, high compression motor like this one = higher crankcase pressure and greater importance of having a can to collect the oil residue. just because the car didn't come with one is not a valid reason to not put one it at all. when ford builds this car, they build it to meet minimum reliability standards and save costs, etc.
even turbocharged cars don't come with catch cans from the factory but go browse their forums and look at how many experienced owners highly recommend them. i think enough people have purchased them for the 5.0 and observed that they are in fact worth owning due to the oil collected in relatively short driving intervals compared to past mustang engines that had considerably lower compression ratios.
moral of the story, to each their own. if you think it is a useless mod, then don't buy one, nobody is forcing you to.
2011 Mustang GT 5.0 Coupe/Brembos/3.73
"I'm also 6'5" and 270 lbs. and could crush a person's bones with my bare hands"