Oil Catch Can FTW (10k mi amount)

[luc]

Research leads to this:

DI injected : Yes
Turbo : Yes
Mustang GT is Port and DI: No need.
Unless Beat it to hell?: maybe
Daily with mild track : No
Still on warranty: No

Gonna leave this here:

“The PCV system includes an oil separator, designed to catch oil before it it drawn into the engine, and return it to the sump.

When these systems work properly, there’s no need for a catch can.
(Fitting a catch can is like taking Panadol for a brain tumour. It’s ineffective, but might make you feel better.)”

“All modifications come with what engineers call ‘feedback effects’ - inevitable changes to the system’s response flowing from some modification to the system.

(For example, upgrading to stiffer springs and stickier, low-profile tyres improves grip - the primary benefit. The feedback effects might include reducing the margin between grip and slip - meaning a sudden transition from grip to sliding, with less warning. Especially in the wet.)”

“For this reason, curing ‘maybe/nonexistent’ problems is a bad idea. Curing the nonexistent problem of oil blow-by with a catch can, which pressures up the system and blows a seal, allowing sump oil to escape could have the nasty feedback effect of catastrophic engine failure, and you will not be covered by warranty. In fact, engine modifications generally (and modifications to related systems) are a great way to give the manufacturer justification to deny a warranty or consumer law claim in the event of a major engine failure.”

Obviously you never tracked your car and have no clue why a separator AND better valves covers are needed on BOTH sides when pushing the car
Separators do not pressurize the system…. Where do you got this idea from ????
Denial of warranty due to using separators is 100% bs….
Do you have any facts or examples ?????

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[CorvZ061]

Is that after one or both oil changes?
That's a lot of oil.

I'd be curious as to how much of that is actually oil. I wont run one on my GT, but I did run one on my old Focus ST. In that car I sent it off to get tested, it came back as being mostly fuel with a little oil thrown in for color essentially. It's been years, I don't have a photo of the printout anymore like I thought.

 

[Qcman17]

Oil yes, water vapor is really good at preventing detonation/knock.

Yeah I knew a mechanic with a built Duster back in the 80’s who ran a water injection system ( that’s what he said it was) on it for that reason and this thing hauled……

 

[Qcman17]

Denial of warranty due to using separators is 100% bs….
Do you have any facts or examples ?????

I saw it happen to a guy on the 5th gen Camaro forum. GM denied the warranty on a blown motor due to him having one even though the LS3’s were known to have debris in the block from machining that could plug the oil pump. They basically said he modified the PCV system warranty void.

 

[luc]

I saw it happen to a guy on the 5th gen Camaro forum. GM denied the warranty on a blown motor due to him having one even though the LS3’s were known to have debris in the block from machining that could plug the oil pump. They basically said he modified the PCV system warranty void.

Aftermarket or Gm parts ?
I use Ford separators just to be safe and also because they fit better

 

[Qcman17]

Aftermarket or Gm parts ?
I use Ford separators just to be safe and also because they fit better

Honestly I can’t recall that now but I do remember it was a 1LE which did come with a factory oil separator ( clean side iirc) in the trunk from the factory oddly enough.

 

[WildHorse]

Yeah I knew a mechanic with a built Duster back in the 80’s who ran a water injection system ( that’s what he said it was) on it for that reason and this thing hauled……

P-51 Mustangs in WWII used water injection for a nice 300hp bump.
https://en.wikipedia.org/wiki/War_emergency_power#WEP_in_World_War_II_aircraft

 

[ice445]

I saw it happen to a guy on the 5th gen Camaro forum. GM denied the warranty on a blown motor due to him having one even though the LS3’s were known to have debris in the block from machining that could plug the oil pump. They basically said he modified the PCV system warranty void.

That's the most famous example, but it was also like 8 years ago now. It's really gonna be a case by case basis. If a dealer/company is looking to get out of an expensive repair, they can use any excuse they want as far as mods go. MM is supposed to protect you in theory, but the onus of proof always seems to fall on the customer in those kinds of cases.

 

[ing3nious]

I would love to see Ford deny a warranty from a Ford part. If that's your concern, it would take about 10 minutes to remove the can if your motor blew...

 

[Jstang23]

I would love to see Ford deny a warranty from a Ford part. If that's your concern, it would take about 10 minutes to remove the can if your motor blew...

Yeah, the only way Ford could deny the warranty for a Ford Performance part is if they claim improper installation. Obviously this opens up a can of worms, so have a dealer or certified shop install it if you want total peace of mind

 

[Qcman17]

That's the most famous example, but it was also like 8 years ago now. It's really gonna be a case by case basis. If a dealer/company is looking to get out of an expensive repair, they can use any excuse they want as far as mods go. MM is supposed to protect you in theory, but the onus of proof always seems to fall on the customer in those kinds of cases.

Yes I agree but the guy asked if there was ever a case of it happening and that is the only one I know of. I think it is unlikely to cause a claim denial but it just shows what happens when too many idiots get involved with something and common sense goes out the window. That one went right to the top of GM corporate too.

 

[Johnny maverick]

I just got my Ford catch can so i decided to get some last minute opinions from the 6g guys. After downloading all the data from this thread in my Binford 5200 thread decoder. It says install the the thing. The juice is worth the squeeze.

 

[FJG_Pilot]

I hear this argument a lot, but I have an issue with it.

Namely that it isn't what we observe in practice, the primary contributor to knock on FI and NA cars (because all s550's are knock limited from the factory) is the fuel itself. If the effective octane was actually being reduced by blow by oil, we would be able to reliably pick up power by adding a catch can to any car (FI or NA). However we don't see that.

Research doesn't seem to have an issue with it.

https://pubs.acs.org/doi/10.1021/acsomega.1c05535

 

[junits15]

Research doesn't seem to have an issue with it.

https://pubs.acs.org/doi/10.1021/acsomega.1c05535

That research just talks about oil, not specifically oil carried by PCV vapors.

 

[chuckhammer]

My passenger side UPR catch can has picked up 1 oz of oil (30 ml) in the 3k miles since I installed it. Car had just 821 miles on the odo at that time.

ETA:
I collect it in a graduated cylinder I had sitting around unused from a past project.

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