Very nice write up! :tup:

Those are excellent OCC's -- I had one for my old SC'd Celica, and it worked beautifully.

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I like them ... I think his design is great. Way better than just an empty can. :tup:

[QUOTE=sixpax;1787627]... back in March at roughly 7,035 miles I had installed this dual oil can catch set up ... today at 7,915 miles I decided to empty both of the cans just to see how much was in there. Was more than I expected, but more unexpected was the fact that the driver side can probably accounted for about 70% of what is in the bag ... 30% from the passenger side can. Weird, I would have thought they would be somewhat even.


Any update on the amount of oil from each of the oil catch cans is appreciated. Is the passenger side oil catch can routing a cause for this oil catch can to trap less oil compared with the driver side one?

Tip: Add a hose from each of the oil catch can drain valves to the bottom of the engine. When you change your engine oil, drain the oil from the oil catch cans.. no need to remove the oil catch cans!

PS: Another oil catch can setup is Speed Force Racing - Your forced induction specialists that was designed for a twin turbo 350Z setup with custom dual intake plenum with dual throttle bodies. I am not sure they are still in business though.

I am not sure why the volume captured on each side is different. Great tip, but I assume you would have to drill some holes in the motor to attach the lines ? Not really hard to drain them the way it is now. Nice set up on that 350Z !

No need to drill holes in the motor! Add a hose of sufficient length the the bottom of the plastic engine belly pan cover. Route the oil catch can drain hose to an opening through the engine belly pan cover.

that is an awesome idea man!!!! ^^^^

That's not what the original set up called for?

Super interested in this since I think I am getting tons of blow by and there is a good possibility Nissan will be giving me a new short block due to severe oil consupmtion, which I think is just blow-by and will happen with the new short block. Was talking with a good friend who is into the STI scene and he was saying that they experience severe oil consumption once built with higher HP in mind. Same thing I think the motor I have is doing since it has already been replaced once, and looking like for the third time. If I am getting severe oil consumption again I am going to go this route with a dual catch can system.

1: How much volume do these hold?

2: You stated after ~900 miles you were surprised by the amount of oil caught. How much was there exactly in each one?

3: How hard are you driving this car honestly? (Comparing to my driving style so I kinda gauge an increase or decrease in total consumed volume)

4: My friend mentioned he knows of several kits that are designed to recirculate the caught oil back into oil pan so it is not wasted, most important point so as not to run low, and no need to constantly empty, another plus. Have you thought of that, and if so do you a possible way, ie: tapping a bung on the oil pan? Only reason I ask is because I was talking to another friend who is a mechanic on some trick cars and suv's and I think he going to do this for me if a: the dealership changes the short block and the consumption is not corrected or b: they figure out som skeezy way of avoiding the replacement (which I dont get the vibe they will attempt after talking with them about it)

Nope ... the original post, pictures and installation are only trapping the blow by, not feeding it anywhere. It's a great idea, and seems like a few different ways you can do it. I have not done it, and am content at the moment with just emptying mine every 1,000 miles or so.

1. Not sure. I have the Micro Style which is a cylinder 2 inches in diameter and 4.5 inches tall. Not all of that area is available for "storage".

2. Didn't measure it, but I would guess around 3/4 of an inch at the bottom of one and about 1/2 inch at the bottom of the other.

3. Like a baby on the street, like an old fat guy on the track (only twice) ... car is not a DD so does not get driven every day.

4. Great idea to recirculate, I think. In looking at the stuff collected in my cans I don't think I am very interested in shooting it back into the block. Condensation makes it a little "watery" in texture and appearance. I'll just dump it out and be thankful I am keeping that out of my engine. :tup::tup:

Don't recirculate the catch can fluids back to the oil pan, it's a bad idea. It's not just oil trapped in them, it's also blowby gas and other vaporized crankcase gasses, which means it's got a high amount of both raw fuel and combustion byproducts (carbon, etc) blended into it. Just smell it once when you're dumping the cans and you'll smell the fuel in it (and as noted above, it picks up a bit of water vapor too).

(Also: you'd be creating a vacuum leak and/or another PCV flow path if you hooked up open drains back to the oilpan, too).

Indeed ... the whole point of doing them to start with was to keep all that stuff out of the motor. Seems a bit defeative to collect them just to put them back in. It is really not that hard to empty them, and only takes a few minutes.

So I'm a noob at this sort of thing, but if this can is catching all of this oil, where was it going in the first place? Seems like just wasting alot of oil. It didnt recirculate back into the engine?

Without a catch can, it does recirculate back into the engine. But it goes in through your intake and gets burned as part of combustion. Either way you lose the volume in the oil pan (which shouldn't be much, a few oz's every few thousand miles or whatever).