Oil Catch Can. Yes or No?

[VAMike]

My point is until somebody does a real world comparison test, one Ranger engine with a catch can, and one Ranger engine without, followed by a motor tear down, it's all speculation as to if the can is really worth while.

It would require a heck of a lot more than one, and would be expensive. No suprise the catch can makers won't bother as long as people buy them without needing any proof of efficacy.

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[dtech]

It would require a heck of a lot more than one, and would be expensive. No suprise the catch can makers won't bother as long as people buy them without needing any proof of efficacy.

It's probably been discussed in this this thread that a number of makers - Ford included have adopted mpi to some of their GDI products, others are Audi, Toyota, Hyundai and I believe Infiniti. This of course adds cost/complexity and they are not doing it for those reasons.

Some of the chem makers have vids of before and after and claim some kind of percentage as to to effectiveness, eg their product removed 68.9999% of the deposits or something like that to reassure that their wares are worth the money.

I have an acquaintance who has looked at a number of 100k plus GDI heads and yes there are deposits on the intake valves - moreso than MPI but he didn't find any really issues with the valves ability to seal.

I'm contemplating adding catch can for insurance reasons - but the goods ones are a bit pricey, the less expensive on I have on my Hyundai GDI catches next to nothing.

 

[HenryMac]

It would require a heck of a lot more than one, and would be expensive. No suprise the catch can makers won't bother as long as people buy them without needing any proof of efficacy.

But the data acquired by (2) motors running side by side, one with a can and one without, followed by a tear down, would be better than no data whatsoever.

There's gotta be a reason Ford added the oil separator to every GDI Ranger.. I'm betting their in-house testing showed it worked good enough to get the motor through the warranty period without any coking issues.

 

[VAMike]

It's probably been discussed in this this thread that a number of makers - Ford included have adopted mpi to some of their GDI products, others are Audi, Toyota, Hyundai and I believe Infiniti. This of course adds cost/complexity and they are not doing it for those reasons.

Well, when the automakers do it they actually test a bunch of engines to make sure that the changes result in some kind of benefit that's worth the cost.

I suspect you're confusing MPI with dual injection, but I'm not certain enough to respond to the rest.

 

[dtech]

Well, when the automakers do it they actually test a bunch of engines to make sure that the changes result in some kind of benefit that's worth the cost.

I suspect you're confusing MPI with dual injection, but I'm not certain enough to respond to the rest.

just semantics - called it port injection or multi port injection, but it has in cylinder gdi injectors and also injectors in the intake outside of the cylinder itself. The benefit is keeping the intake valves clean - as with mpi engine before gdi .

 

[dtech]

toyota has their own name for it , not sure what ford calls it, toyota uses the mpi injectors in certain operating scenarios like low load and rpm, higher demands for power revert to gdi.

 

[VAMike]

just semantics - called it port injection or multi port injection, but it has in cylinder gdi injectors and also injectors in the intake outside of the cylinder itself. The benefit is keeping the intake valves clean - as with mpi engine before gdi .

Multi port injection was its own thing a long time ago, and doesn't require direct injection. It just meant an injector per cylinder, in contrast to single point injection.

 

[txquailguy]

Just so everyone knows....I run Mobil 1 Extended 5w-30 with a Motorcraft 910S filter. Change it every 4k to 6k. I'm filling up with Sams Club 91 octane at $2.21/gal right now. I run approximately 110mi/day on the Interstate. I'm keeping track of how much liquid I am catching daily....more to come.
BTW...had her at the dealer for an oil change and problem with the drivers side air. Anyway, they loved the wrap and I was talking to the service advisor about aftermarket mods and warranty. He told me that all of the service technicians love the mods and unless something can be traced DIRECTLY back to a mod....the warranty is fine.....just passing that along.

 

[seanellaz]

why not an air/oil separator? Then you could skip the maintenance. Initial cost and install would cost more though.
Do you know what system Ford uses to separate oil for PCV?

Oil Separator, Part #: 6A785. On the side of the motor, between block and Turbo

 

[Racket]

I have very similar results. Near as I can tell it is a water, fuel, and oil mixture. My Blackstone test came back fine so I am not going to fret over it. Truck runs fine.

My Blackstone test came back back very good, but the action of the catch can might be part of the reason for that.

 

[Ace Holliday]

My Blackstone test came back back very good, but the action of the catch can might be part of the reason for that.

I believe it is. I also believe it is mostly water (condensation) in my case. But everything we empty out of that catch can would be sent back through the system. I am glad I opted for the can.

 

[Floyd]

My Blackstone test came back back very good, but the action of the catch can might be part of the reason for that.

Thus far catchcans have been touting the extraction of vented oil and preventing it from reaching the intake.
You seem to now claim that a catchcan actually improves crankcase ventilation?
If anything, a catchcan would restrict ventilation, certainly not enhance it.

 

[Ace Holliday]

Thus far catchcans have been touting the extraction of vented oil and preventing it from reaching the intake.
You seem to now claim that a catchcan actually improves crankcase ventilation?
If anything, a catchcan would restrict ventilation, certainly not enhance it.

By design there is no way a catch can will restrict flow. At least not the Mishimoto can anyway. Of course the jury is out on a can helping with the carbon build up on the valves. But I know for a fact the crap I empty out of my catch can would have been routed back into the induction system. There is no denying that.

 

[Floyd]

By design there is no way a catch can will restrict flow. At least not the Mishimoto can anyway. Of course the jury is out on a can helping with the carbon build up on the valves. But I know for a fact the crap I empty out of my catch can would have been routed back into the induction system. There is no denying that.

Not the point of my post ... Racket seemed to imply that a catchcan would actually enhance crankcase ventilation.
But to your point... don't empty your catchcan and see what restrictions develop, especially in cold weather.

 

[Dustanmont]

Oil Separator, Part #: 6A785. On the side of the motor, between block and Turbo

The factory separator does a pretty good job. Like any separator it is not 100% effective but I believe this is the reason we mostly catch condensation and raw fuel in our aftermarket systems.

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