For anyone who has ever doubted catch can...

[ADY]

I have the JLT catch can installed but surprised when it wasn't full yet the dealer confirmed that it lost 1.5 quarts in 3k miles (getting the valve covers replaced under warranty). Question, where is the oil going if its not being caught in the catch can? Is it a poor design by JLT?

 

[subzero05]

wow that's impressive and a bit concerning at the same time

 

[goblues38]

View attachment 117797
, I figured I’d drain my catch can for the first time. It’s been on for about 20k miles. (I know, shame on me.)
.

That is exactly why these things are not included from the factory. That and all that gets burned off harmlessly over the course of 20k miles.

 

[ColoradoBoss]

Hi. Dumb question but I just pulled my stock intercooler to install a cobb intercooler and there is oil dripping from the intercooler piping, would a catch can fix that?

 

[Truckasaurus]

Hi. Dumb question but I just pulled my stock intercooler to install a cobb intercooler and there is oil dripping from the intercooler piping, would a catch can fix that?

Yep. It would.

And to the OP - no one ever doubted a catch can. At least no one who cares about performance or plans to keep their vehicle long term.

https://www.caranddriver.com/reviews/a23888636/2017-ford-f-150-raptor-reliability-maintenance/

Quote: "In May 2017, just after completing its 1000-mile break-in period, our Raptor vaporized the 60-mph mark in 5.5 seconds and bulldozed its way through the quarter-mile in 14.2 seconds at 97 mph. By June 2018, some 39,000 miles later, it added 0.5 second to both milestones and lost 4 mph from its trap speed. In the wrap-up test, the truck needed an additional 2.5 seconds to reach 100 mph. Some of the Raptor's horsepower, it seems, had disappeared as quickly as seven BFGs and 2850 gallons of gas."

That is what happens when your engine "harmlessly" burns off quart after quart of oil. Your valves and pistons get junked up with additional carbon deposits, which reduce air flow and create hot spots, increasing the chances for pre-ignition, which cause the computer to pull timing and reduce engine output.

Catch cans help maintain performance over time. Period.

 

[Fordraptorrrrrrrr]

I installed the UPR catch can not long after getting my '19 last summer. First time I emptied it just a little oil came out and I kinda thought my CC was a waste. Well I just emptied it yesterday after not emptying it for awhile and about 5 oz. or so of peanut butter milkshake looking oil came out, it was nasty lol. Glad my UPR CC captured the gunk vs being recycled back into my engine. I'd say the investment was definitely worth it.

 

[GunMonkeyINTL]

I have the JLT catch can installed but surprised when it wasn't full yet the dealer confirmed that it lost 1.5 quarts in 3k miles (getting the valve covers replaced under warranty). Question, where is the oil going if its not being caught in the catch can? Is it a poor design by JLT?

No. Those are unrelated issues.

A catch can / oil separator is just catching oil that is vapor in the air of your crankcase. Every engine has oil vapor in the crankcase air, and its loss amounts to no more than a few ounces in an oil change interval - at most.

In older engines, it was just allowed to solidify and drip out the side of your crankcase. In your engine, that valve that allowed it to drip out is routed back to your intake, via a hose (which now has a baffled can installed in that circuit to catch it).

If you engine is burning/losing oil by the quart, its not escaping through the PCV valve. It’s leaking from the oil pan, crankshaft bearing, piston ring, cam bearing, valve bearing, or valve cover- the areas where you could lose/burn oil in large volumes.


The amount of oil caught by a separator is actually pretty small. The reason you see posters showing several ounces collected in a single oil-change interval is that the other source of moisture found in crankcase air is water- and in much higher concentrations than the oil. That’s why the separator collects what looks like chocolate milk- the same mess you get if you leave your oil drain pan out in the rain.

 

[Rednose]

You can still get some build up and you can get build up and a coating in your CAC. There is no damage to worry about but there is still many benefits to having a catch can, especially in forced induction applications since they have more blow by than NA.

For anyone interested we offer catch cans from UPR and JLT. Message me for pricing

Please do Dm me the prices.

 

[tplee]

^^^That's not how the air/oil separator and catch can works at all, and the ONLY reason why automotive engineers design vehicles to breathe their own crankcase vapor is because of the EPA.

This doesn't pass the smell-test.... so the EPA "wants" us to burn more motor oil?

 

[tplee]

Why not just empty it after a drive?

Why not just save yourself the trouble and forgo this snake oil altogether? If you are going to buy snake oil, at least buy something that doesn't require constant maintenance.