I put a catch can on mine first week I had it (got it in February 25') on Tungsten HO. Have 2,500 miles and it is definitely collecting the sludge. I put them on every vehicle I have with Direct Fuel Injection that has a PCV (positive crankcase ventilation). Have them on a new Lincoln Navigator and 23' BMW Z4M. I prefer OSC when possible (they come in black or silver/titanium), but the BMW required a different brand. Ridiculously easy to install and easy to clean (empty every 5-8K miles as needed). Have had them on multiple other vehicles before these three I currently own and they 100% do their job without robbing any power or even changing the overall function of the PCV system (just cleaning it up, drop by drop) and are actually improving it by keeping it's lines and ports clean over the years. I still kept the original/factory vent hose though just in case of warranty issues and a dealership getting a bug up their **** about the engine having a supposed "mod". I've never ran into that by any dealer, but still (BMW dealerships though are a real treat to deal with). The reason you will never see this installed by any auto manufacturer is that they do not care about the longevity of the engine past their own manufacturer's powertrain warranties, which always excludes "normal wear and tear" that includes build-up and caking from fuels and lubricants. So, they save time, money, and weight on something that ultimately does not affect them as the manufacturer.
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