Recently i posted a thread regarding my neighbor's 2011 (said 2010 in error) Kia Optima 2.4 reaching 200k miles. He isnt fussy about maintenance, mostly getting conventional oil changes at the dealership and quick lubes etc. Car has been exceptionally reliable.
Today i saw him under his hood and asked if all is well. He said, "yup, just emptying my catch can." Surprised, i asked how long he's had it. "It's been installed since 10k miles." He's of rhe opinion it has kept deposits at bay.
My question is do you think CC actually work? I've been unreasonably cynical about them for years, having read both sides.
'18 KIA Sportage LX AWD: Mobil Super Synthetic 10w30 '13 Hyundai Santa Fe Sport 2.0T: EDGE 5w30
Fact is they collect oil. Keeping the elements caught out of the intake manifold is good no matter what. How much benefit is a variable. A great benefit is placement, preferably plumbed with a long enough hose for condensation to occur. Mine has a hose running from the firewall, along the fender, down to the front of the engine, can mounted at the lowest point behind the radiator on the splash guard. It is, so far, 100% effective, as the return hose is free of oil deposits. Naysayers argue assumptions. I have one, it collects stuff. Some of it is oil that would otherwise be on my intake valves that would not be removed due to lack of PFI. I view it as a bypass filter for oil, I will still be cleaning the valves periodically, but not as frequently. How well it works only time will tell. Best place for it is in the lowest, coolest place possible for the condensation to occur.
95 Cherokee 190K DELO 10W30, XG8 07 IS250 100K Napa 10w30, FULL 04 YZF-R1 19K DELO 15w40, XG7317 99 HD XL1200S 20K VR1 20w50, NG1515 14 RX450h 33k PP MIX, NG7047