Carbon buildup is an enemy of any motor, and the Mishimoto Direct-Fit Oil Catch Can system for your 2011+ Ford F-150 is the defense. Modern vehicles use a PCV, or Positive Crankcase Ventilation", system to capture the vapors that escape past the piston rings into the crankcase of your engine and recirculate them back into the intake system to be burned again. While this is much better for the environment, it's not as great for your engine. In doing so, these vapors carry remnants of oil and unburned fuel, which make their way into your intake system, causing multiple problems. The first and largest problem is that the oil particles being carried in these vapors coat your intake system, including the intake manifold and intake valves. Over time, this will gum up and turn into carbon buildup. Direct-injection engines, like the EcoBoost, are especially prone to severe carbon buildup on the intake valves. The second issue is that those oily vapors being introduced back into the cylinder during combustion can reduce the overall octane rating of the fresh fuel being provided, causing pre-detonation and knocking. This is where the Mishimoto Direct-Fit Oil Catch Can system comes into play. By installing our catch can in line with your PCV system, the 50-micron bronze filter captures those oily particles and allows them to condense until they become heavy enough to drip into the canister to be collected instead of flowing back into your engine. This leaves the air flowing back into your intake system clean and ready to be burned again. The catch can mounts with a sturdy 3-mm thick steel bracket in a convenient and serviceable location, allowing you to easily empty the waste oil. The pre-molded hoses with factory style quick-disconnects make installation a breeze, and even fit with the factory engine cover. As with all our products, this catch can is backed by our signature Mishimoto Lifetime Warranty.