Dodge writes their tunes while taking into consideration that the octane level will be lower with that oil being recirculated back into the motor. Why doesnt Dodge put a better flowing intake, better flowing exhaust, at minimal short tube headers instead of the terrible log manifolds, why the crushed y-pipe instead of a better flowing y-pipe, why the extremely conseravtive tuning knowing that the motors are capable of much much more, why use an inefficient tq converter that is a big part of the 25% drivetrain loss that these trucks have??? There a thousand things that the manufacturers can do to improve these trucks. We mod our trucks to make them the way we want. Adding a catch can to better protect our motors and have a better performing motor is just 1 of those things...just like adding a cold air intake, better flowing exhaust, and a more aggressive tuner.