J&L OIL SEPARATOR CO

[riddler]

17 minutes ago, TrueBlue said:

Well, if the can catches any vapor at all, that it turns into liquid, it should amount to a lesser buildup on the valves. Or so I would think. I just don't know to what extent it might amount to.

I installed a catch can on my 2018 Fat Boy, and I did have to empty it from time to time. That small amount would have been sent straight into the throttle body, so I know it was doing at least some good. I would think the same would apply here.

Some of us like to hedge our bets. Especially given that we don't get to write our "investment" off like some companies do.

Yes well either way do what feels right I suppose. Thats what I am doing. 

[Pryme]

4 hours ago, riddler said:

There are plenty of owners here not using the CC to compare too. You obviously arent what truck do you drive? Miles?

2022 2500 gas. 17,000 miles. Basically only drive when the whole family goes somewhere, when I need a truck or a big snowstorm. 

Edited May 30 by Pryme

[riddler]

57 minutes ago, Pryme said:

2022 2500 gas. 17,000 miles. Basically only drive when the whole family goes somewhere, when I need a truck or a big snowstorm. 

[BCGM]

On 5/29/2026 at 6:47 AM, Pryme said:

It’s my personal opinion that the only one benefiting from this is the manufacture. It’s completely unnecessary. 

Pryme ! I was thinking of adding one to my 2024 6.6 gas  . Could you elaborate a bit more on your statement 

Thank You 

[Byrds8]

6 hours ago, BCGM said:

Pryme ! I was thinking of adding one to my 2024 6.6 gas  . Could you elaborate a bit more on your statement 

Thank You 

The people say they are not needed generally say that because they say its mostly not oil the can has in it. Reading various threads, you'll see people say that the can heats and cools causing condensation. They say that even though there is some oil in the liquid you pour out, it's not enough to amount to anything. I used to run cans on my engines and I would pour out about a half a quarts worth of liquid during the OIC. However, I did not loose half a quart of oil during the same time frame. With that in mind, I stopped using them and said screw it. Right or wrong, that is the way I went. 

 

Even if there is only a small amount, a can will help keep it out of the engine. Its not going to hurt anything to run it unless you forget to dump it.

 

Will it make a difference long term, who knows. 

[Grumpy Bear]

 

 

Just did an injector/HPFP replacement on Pepper at 192,400 miles; close enough to 200K, RIGHT? (If 200K is considered life end and to me it isn't). But hey, to each his own. 

 

Have never run a catch can on this vehicle. Back side of every valve looked like a new valve spray painted semigloss black. Port walls looked 'neat' (all a normal result of passive EGR via VVT) Zero build up even in AFM cylinders. Just color. It uses no measurable oil and never has. 

 

At 155,000 I put her on E-85 and a borescope of the cylinders at plug change showed very clean pistons and valve faces. The replaced injector tips looked new. (It was the pump piston seal that was leaking). Oh well, have six good backups. 

 

Still gets 28 mpg on gas (highway average) and over 20 (highway) on alky. UOA's look good and runs as good now as it did when I bought it. Better in fact. 

 

What improvement would a Catch Can provide this motor?

 

 

And given all this I expect that IF I installed one I'd see some water/gas/oil vapor accumulation. Byproducts of normal combustion.

 

Having said that, IF my motor used an appreciable amount of oil I'd consider it a useful 'crutch' until I had the situation corrected OR if bore polished, until I junked it or rebuilt it to stave off repeated plug fouling. 

 

I'm not telling you what I THINK. But what its DONE.  

 

 

 

 

[Pryme]

On 7/4/2026 at 10:58 AM, BCGM said:

Pryme ! I was thinking of adding one to my 2024 6.6 gas  . Could you elaborate a bit more on your statement 

Thank You 

Meaning the manufacture of the catch can. They are completely unnecessary.