Oil catch cans - Mazda CX3 Forum
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post #1 of 9 Old 12-10-2015, 05:58 PM Thread Starter
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Oil catch cans

I have not had the time to look into this for our cars just yet being that I just got the car last night but I was wondering if anyone has installed a catch can in our cars as of yet. I'd imagine it would be ideal to not be vented and contain an internal baffle material of course.
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post #2 of 9 Old 12-10-2015, 06:46 PM
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What is an oil catch can?

Currently CX5 SportNav 2.2 diesel automatic and AWD.
Formerly CX3 SportNav 1.5 diesel automatic and AWD.

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post #3 of 9 Old 12-10-2015, 06:56 PM
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Originally Posted by anchorman View Post
What is an oil catch can?
Not something I would ever see on a CX3. Some in the forced injection community use catch cans so they can run "cleaner". They've always been controversial.

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post #4 of 9 Old 12-10-2015, 07:25 PM
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Not something I would ever see on a CX3. Some in the forced injection community use catch cans so they can run "cleaner". They've always been controversial.
So whats it do ???

Currently CX5 SportNav 2.2 diesel automatic and AWD.
Formerly CX3 SportNav 1.5 diesel automatic and AWD.

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post #5 of 9 Old 12-10-2015, 07:32 PM
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Its a bypass that is used to filter out gunk from oil vapor that can impact the manifold.

Oil Catch Cans | Everything you need to know and more!

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post #6 of 9 Old 12-10-2015, 09:11 PM
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Oh right. My diesel hasn't burned one molecule of oil in 3200 miles as far as I can tell which suggests that there isn't a lot of blow by in the cylinders. How are you guys getting on for oil consumption in the petrols, sorry gas engines?

Currently CX5 SportNav 2.2 diesel automatic and AWD.
Formerly CX3 SportNav 1.5 diesel automatic and AWD.

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post #7 of 9 Old 12-10-2015, 09:37 PM
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Oh right. My diesel hasn't burned one molecule of oil in 3200 miles as far as I can tell which suggests that there isn't a lot of blow by in the cylinders. How are you guys getting on for oil consumption in the petrols, sorry gas engines?
Just on 2000km in my petrol version and not a drop used that I can detect on the dipstick. Mazda service guy told me that a little bit of oil use in both petrol and diesels is not out of the question. He suggested around 500 to 1000ml was not uncommon in the first 10000km but should fall to zero after that. Don't know how true this is as this is my first Mazda.
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post #8 of 9 Old 12-10-2015, 10:14 PM
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The 1.5 diesel is brand new and I was half expecting it to use oil. It's been a pleasant surprise in that respect.

Currently CX5 SportNav 2.2 diesel automatic and AWD.
Formerly CX3 SportNav 1.5 diesel automatic and AWD.

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post #9 of 9 Old 12-11-2015, 12:59 AM Thread Starter
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Initially I thought it was something that only "high performance forced induction" cars had to invest in but surprisingly a lot of naturally aspirated hyundais and nissans both 4 and 6 cylinders and some mazda3s (since I was around their forum) as I recently looked around into still catch blow by from the pcv valves. I imagine theres plenty of other examples but these are just the ones from experience I can attest to. It is an emissions thing where they recirculate oil and fuel vapors and such back into the combustion chamber to burn it off entirely. Not sure if that is the case with these engines as well but given the strict emissions restrictions here in the states, I would imagine a similar setup is in place.
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