Results: 7,000 after catch can

[Evergreen6]

Originally Posted by stoopid

More discussion on the topic:

http://www.camaro5.com/forums/showthread.php?t=179559

I found this when I googled "oil catch cans are useless" .

Note that's for LS(x) motors. Direct Injection (V6 Camaros) introduces secondary concerns about valve coking because of PCV emissions and no fuel wash from the injectors.

But even then, (14k of my own miles to attest to it) --I don't think it's going to be a big concern for the DI engines either.

[Vroom_vroom]

wait till you get some miles on it. i held out for a long time 26k to be exact, i had a lot of shit in my intake and i know my rings where seated in properly......

[Evergreen6]

Originally Posted by Vroom_vroom

wait till you get some miles on it. i held out for a long time 26k to be exact, i had a lot of shit in my intake and i know my rings where seated in properly......

My sister has what I'd guess is an LLT (2011 Traverse).

70k and still no issues.

[suzook]

Originally Posted by c5z28

Oil is not BAD for the top end of your engine(especially if some oil is getting on the valve and oiling the guide...
Just another money pit people like to try to rationalize.
Sorry I am STILL not sold.

I couldn't agree more. I laugh every time I see a catch can thread.

[Iron Lung Jimmy]

All that oil in the bottle certainly looks bad, but let's put it in context...

I'm guessing that is six ounces of oil. There are about 590 drops of oil per ounce, so that bottle contains around 3540 drops. 3540 drops over 7000 miles is roughly 1/2 drop of oil per mile.

The catch can is collecting 1/2 drop per mile.

How many cubic feet of air does an engine use per mile? I have no idea but it is probably a big number. So you have 1/2 drop of oil vapor diluted with however much air the engine uses resulting in a really, really small amount of oil per cubic foot of air.

I think the engine can easily handle that.

[myold88]

Originally Posted by c5z28

Oil is not BAD for the top end of your engine(especially if some oil is getting on the valve and oiling the guide...
Just another money pit people like to try to rationalize.
Sorry I am STILL not sold.

I also agree. Catch Cans were invented to sell catch cans imo.

[GretchenGotGrowl]

I have two catch cans. I'm twice the idiot I guess.

[el ess A]

You either believe or you do not. I don't care if you believe or not. I do not want crap like that in my engine, hence a catch can. At least I know how much is NOT getting into my intake. To me it's better to have it and not need it, than need it and not have it.

Anyone who thinks PCV systems were designed to oil the top end of your engine does not understand how engines are supposed to work.

There are engines out there that belch out more than 1/2 drop per mile, and not all the oil gets burned in the combustion cylinder.

What I'd like to see is a 100K mile test on two similar engines, one with and one without a catch can and check the intakes to make a case one way or another. That's the only way you can convince either side (and the zealots from either camp will always make an excuse even if science proves otherwise) that catch cans benefit or are a waste of money.

[gajagfan]

Originally Posted by el ess A

What I'd like to see is a 100K mile test on two similar engines, one with and one without a catch can and check the intakes to make a case one way or another. That's the only way you can convince either side (and the zealots from either camp will always make an excuse even if science proves otherwise) that catch cans benefit or are a waste of money.

This is the test I would love to see as well.

[xc_SS/RS]

I've got one and if I can keep the valves and intake manifold a little cleaner I will take it. I was sold once I saw how much came out of mine in around 3k of driving and then spilt it on the driveway as I knocked the cup over... Whoops.

And yes I sleep better at night. Lol

[TommyTheCat]

Originally Posted by c5z28

Oil is not BAD for the top end of your engine(especially if some oil is getting on the valve and oiling the guide...
Just another money pit people like to try to rationalize.
Sorry I am STILL not sold.

Unless it builds up
which it does

The audis and VWs that used direct injection since early 2000s have a lot of these problems, look it up. If you don't want to keep your camaro, fine don't keep a can. But for those of us who do want to keep our camaros, this definitely prolongs its life by a long time.

A 2009 3.6L direct injection GMC Acadia I worked on had the entire air boot filled up with oil after about 90,000 miles. Engine looked horrible, lots of oil build up thing wouldn't run right at all even after emptying the air boot.
same engine as the v6 camaro

[Dizzy82]

Originally Posted by Evergreen6

Yes. Catch cans were born from racing, and the goal was to keep crankcase blowoff/emissions OFF of the track, since crankcase ventilation used to consist of a hole or tube coming out the side of the block, vented at the ground. It has nothing to do with engine longevity...race engines are usually torn down regularly anyway, and/or they see mechanical failure early from high engine speeds.

Is there any doubt there are LLT/LFX engines out there with more than 100k, 150k, with no catch cans? How many people are going to keep their Camaro that long?

And while we're talking about gases and other vapors entering the intake, why does nobody do anything with the LLT/LFX EGR system? (They route right back through the intake...)

My car has almost 119,000 miles and I will continue to run with my catch-can.

[SSMY1LE]

[Ragnar]

Pictures are worth a 1000 words!