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Oil catch can
- Thread starter Nascar Tommy
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Scram1500
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Here's what my neglected catch can looks like this winter. Wouldn't unscrew until I thawed it out. Hasn't happened before in the last 6 years but this is my first winter where I'm not parking in a heated garage 
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Scram1500
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Probably a month and it's been single digit temps for the last 2 weeks
Have you been doing a lot of short trips lately? Your can shouldn’t have filled up that quickly. The catch can on my 2014 F150 collects the most and even after three months (winter) it’s only half full.
RebelliousGt
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That’s a lot of condensation, more than normal, I live in Canada where it gets -30c at night and mine just looks like chocolate milk, due to the fact that the oil ratio to water keeps it from freezing. Your baffle is all crusty. At 8,000 km mine is always just over half to about 3/4 never full. I also have the exact same mishimoto extended canister with the baffle. I’m baffled
no pun intended 
Scram1500
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Normal driving, 20 miles or so per trip.
Yeah hardly any oil hence the cylinder of ice. Baffling indeed. I used to lurk on Audi forums years ago when I had an A4 turbo and people there would fill cans in a week during winterThat’s a lot of condensation, more than normal, I live in Canada where it gets -30c at night and mine just looks like chocolate milk, due to the fact that the oil ratio to water keeps it from freezing. Your baffle is all crusty. At 8,000 km mine is always just over half to about 3/4 never full. I also have the exact same mishimoto extended canister with the baffle. I’m baffled
That's not too comparable. That cold of sir doesn't hold a lot of moisture. If you are in an area where it snows, freezes, then warms up enough to melt the snow/ice, it puts a lot of moisture in the air.That’s a lot of condensation, more than normal, I live in Canada where it gets -30c at night and mine just looks like chocolate milk, due to the fact that the oil ratio to water keeps it from freezing. Your baffle is all crusty. At 8,000 km mine is always just over half to about 3/4 never full. I also have the exact same mishimoto extended canister with the baffle. I’m baffled
I mean, It's doing it's job.
RebelliousGt
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I just emptied mine today with only 3500 km since last oil change and emptying. The catch can was 85-90% full with 30% water
never had that happen since new 3 years ago. Now it’s filling up before half the mileage till the next oil change.
It winter time, and probably had some pretty high humidity, or snowfall.I just emptied mine today with only 3500 km since last oil change and emptying. The catch can was 85-90% full with 30% water
For what it's worth, I think they are a solution in search of a problem. I've put 100k miles on two 3.5 ecoboost motors which are turbo and direct injection, with stock pcv systems and never had an issue with the motors. No loss in power, no valve coking, and I towed extensively with both. Just kept up on 5k mile oil changes with Pup 5w30 and drove it responsibly. The hemi isn't forced induction or direct injected. If it makes you feel good and you don't mind always emptying it, and want your pockets to be lighter, get one. But just like a CAI, it's not needed and won't provide any noticeable benefit in the time frame most own these vehicles. Just my two cents.
Catch cans have been in use long before direct injection was a thing, other than diesels. If they weren't effective, they wouldn't be found on almost every race car. Whether you feel there wasn't a problem they were solving doesn't change facts.
And just because they’ve existed for a long time doesn’t change facts that they’re unnecessary on modern production engines.
Cold air intakes have been around a long time too. Once upon a time, and for some applications, they made a difference.
Today there are “good” CAI’s available that don’t hurt anything, even if they don’t help anything either. But there are also plenty of cheap bad ones that filter like a screen door and suck hot air or worse.
I think the CAI to CC analogy is pretty apt.
Cold air intakes have been around a long time too. Once upon a time, and for some applications, they made a difference.
Today there are “good” CAI’s available that don’t hurt anything, even if they don’t help anything either. But there are also plenty of cheap bad ones that filter like a screen door and suck hot air or worse.
I think the CAI to CC analogy is pretty apt.
RebelliousGt
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All the other winters just turned it into a coffee latte, this year there’s actual water to oil separation
Thats because modern factory intakes are actually designed for flow more than sound reductions. The only real change to engines is they have tighter tolerances, but there will always be blow by on the rings, nothing you will ever do to prevent that. Which is why there is a PCV system in the first place . A catch can will always catch crap that is sucked out of crank case. As long as there is a functioning PCV system, a catch can will always be beneficial.
