Turner S55 Baffled Oil Catch Can and Drain System
The benefit of having a catch can on your F8x M3/M4 has to do with how much oil vapor is being recirculated back into the engines intake system to be burned. This recycling process is used mostly for emission purpose to keep these harmful vapors out of the atmosphere. Though it is better for the environment its typically not much better for you engine since the burnt oil will slowly become carbon build up & sludge through vacuum hoses, PCV system, and valves. The catch can assist in separating oil and water vapor from the crank vent system.
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