You disagree with the condensing 'theory', yet every catch can collects significantly more in cold weather....

 

The real center of the debate is: is it better to let what a catch can collects go into the intake system or to remove it? Some say Ford, in its infinite wisdom, would have installed one if it were needed. Others say there are many shortcomings Ford did not address, the omission of a catch can being just one of them. Each truck owner will have to decide.
I have decided that I believe the catch can is more of a benefit than a liability for me that religiously looks after scheduled maintenance.

 

of course there is...... just not as much.... and since there is some the lube you get from it is still meeting what some other answers here say is necessary.

 

I'm a bit confused. Just what does that 'top end lubricant' lube and can you show an example of this process? I'm also interested in an explanation of 'Fords patented system of washing the intake valves with fuel on DI motors only.

These seem to be important point in the rebuttal of catch can use. A little more clarity may be useful.

 

Correct, but some of us without DI still have a concern on too much or too little that passes back through our intakes. Without long term monitoring we will probably never know the harm or benefit of a catch can.

 

If a bone stock mass produced OEM vehicle needs a catch can then something has failed or there is a serious design flaw with the engine and it's time to start looking at other brands.

Modified engines, power adders, etc.... totally different story.

 

What is your definition of modified?

A stock twin turbo V6 pushing over 400lbs of tq pulling a 12,000lb trailer cant be compared with a 4 cyl Ford Focus. Hell, i havent seen a 5.0L with a supercharger without a catch can yet.

 

The 3.5 motor was designed from Ford to make that power and under those towing/work conditions. The 5.0 was not designed to have a supercharger and all that extra pressure in the CC. Yes it handles it fine but it wasn't designed with 700+hp and all that boost in mind. What cars that come from the factory making that kind of horespower have catch cans from the factory? ZR1? GT500? 488? GT2RS? Hellcat? None of them, the were designed not to need them.

I have put catch cans on motors before, but that's when doubling the HP and boost that it had from the factory.

 

They're referring to the oil you're trapping in the catch can. It can be argued that this helps to lubricate the valve/seat. Much like lead did in leaded gas. Also the water vapor possible have a small steam cleaning affect. You can make this argument just as much as trapping it is better... nobody has solid proof either way. Just more of a devil advocate.

Here's more info on how the "wash" the valves with DI only motors.

https://patents.google.com/patent/US7137377

 

Well that's not true... the new GT500 has a catch can that comes with the track pack. And I'd also argue that Ford designed the 5.0 from the get go with it being supercharged in the future. Much like when they designed the Cyclone V6 they had designed it to be later turbocharged.

https://www.ebay.com/itm/2020-Mustan...-/233347186603