I'm of the opinion that they are effective at removing water/oil, but a relative pain in terms of maintenance (mostly when it gets subfreezing where the water caught could freeze and cause a vacuum problem that has the potential to blow seals/gaskets).
I've heard that the moisture caught would normally evaporate during hot engine temps, but I think I'd still run one that has an easy to remove can. I won't be putting one the gti I have currently due to the fact that a cleaning is about the same cost as a catch can, but if I were to get another DI-engine car I'd likely install one.
Cars with better pcv systems seem to have less of an issue, so I'm kind of monitoring which cars are having less carbon build up issues and leaning towards those as viable options in the future.
I've heard that the moisture caught would normally evaporate during hot engine temps, but I think I'd still run one that has an easy to remove can. I won't be putting one the gti I have currently due to the fact that a cleaning is about the same cost as a catch can, but if I were to get another DI-engine car I'd likely install one.
Cars with better pcv systems seem to have less of an issue, so I'm kind of monitoring which cars are having less carbon build up issues and leaning towards those as viable options in the future.
'19 Golf R
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J Ray's Top Ten
Previous: '99 BMW Z3 2.8L | 2019 Honda Ridgeline | 2010 VW GTI | 2008 CBR 600RR | 2005 Nissan Titan SE King | 2003 Honda CBR 600RR | 1998 Integra RS | 1998 Suzuki GS500e | 1999 Honda Civic Si | 1986 VW GTI 8v
Intro
J Ray's Top Ten
Previous: '99 BMW Z3 2.8L | 2019 Honda Ridgeline | 2010 VW GTI | 2008 CBR 600RR | 2005 Nissan Titan SE King | 2003 Honda CBR 600RR | 1998 Integra RS | 1998 Suzuki GS500e | 1999 Honda Civic Si | 1986 VW GTI 8v