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The 3.7 is a port injected engine and does not require any catch can. There is generally only an issue with DI engines needing a catch can.
I would install a catch can on any forced induction engine (turbo or SC) no matter if it was DI or not.

How's the 3 oz capacity working out for everyone? JLT states every 2-3000 miles, I'd rather it make at least one oil change...

I only ask because if you look at some aftermarket brands, 16 oz is "small" and 20 oz is the large option.

i.e. Aluminum Oil Catch Can - Small
I change oil every 5000 miles. I empty my JLT catch can 1/2 way through an oil change. You really should be opening the hood more often then just at oil change time.
 

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Go to any Rat Rod or racing event, see all the different versions of catch cans. From Beer cans to beautifully Tig welded pieces of art.
 

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OK, I have the JT catch can installed and its accumulating about 1 oz of oil every 2,500 miles. Better in the can than sucked thru the intake! Query - would pouring the oil from the catch can back into the engine cause any issues?
 

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How's the 3 oz capacity working out for everyone? JLT states every 2-3000 miles, I'd rather it make at least one oil change...

I only ask because if you look at some aftermarket brands, 16 oz is "small" and 20 oz is the large option.

i.e. Aluminum Oil Catch Can - Small
It looks like JLT catch can rebranded slightly to an oil separator company and they offer an extension can that screws onto the latest 3.0 versions. This increases capacity from 3.0oz to 6.0oz. I'm trying to figure out if there is enough clearance for the extension on the Transit though. Can anyone who has the JLT installed comment on how much clearance there is below the can? Seems like there might not be another 3".
 

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It looks like JLT catch can rebranded slightly to an oil separator company and they offer an extension can that screws onto the latest 3.0 versions. This increases capacity from 3.0oz to 6.0oz. I'm trying to figure out if there is enough clearance for the extension on the Transit though. Can anyone who has the JLT installed comment on how much clearance there is below the can? Seems like there might not be another 3".
I think not. There is barely enough room to get the stock (JLT) one off. Could be probably be easily relocated to allow room though. I'll take a look-see later this week.
 

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I think not. There is barely enough room to get the stock (JLT) one off. Could be probably be easily relocated to allow room though. I'll take a look-see later this week.
Thanks! When you take a look, also consider if a custom bracket might make it feasible. I took a look under the hood, and there's a spot 2-3" inward towards the engine that would allow for a deeper can, and of course a custom bracket could raise the thing up a few inches. Based on how fast folks say they fill up, it would be nice to have a little more buffer.
 
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I am attaching a link to an exceptional discussion of valve deposits, the EGR system, and oil catch cans. He presents some very interesting results of the Society of Automotive Engineers (at 2:58 minutes in) which quantified the impact of EGR on valve deposits. Worth watching:
 
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2019 Transit cargo, HR, 3.5 Eco, Quigley 4X4, “Vandemic”
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My 2019 3.5 Eco Transit is still under warranty (picked it up new in 03/20). Would adding a catch can void it? I don't really want to wait 2 more years to try to prevent the valve issues. Or... should I bite the bullet, and purchase the JTL?
 

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Some catch cans can be easily installed and uninstalled, to put the vehicle back to oem, in a matter of minutes.
 

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My 2019 3.5 Eco Transit is still under warranty (picked it up new in 03/20). Would adding a catch can void it? I don't really want to wait 2 more years to try to prevent the valve issues. Or... should I bite the bullet, and purchase the JTL?
I really don't see how a catch can would void the warranty, but if you're worried, it's super easy to install and remove, just keep your OEM PCV house. The connectors are actually made to be easily removed and installed.
 

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2019 Transit cargo, HR, 3.5 Eco, Quigley 4X4, “Vandemic”
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JTL oil separator (catch can) installed. Having never looked a a PCV valve before, I noticed that the valve has a little “play” in it. It wasn’t anything that could be screwed in tighter. Is this normal or could the valve have a crack in it? Motor vehicle Car Automotive design Automotive super charger part Auto part
 

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Can anyone tell me why the catch can is only installed on one side?

Why doesn’t JTL make one for the driver‘s side?

could it be worthwhile to install one on both sides?
 

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JTL oil separator (catch can) installed. Having never looked a a PCV valve before, I noticed that the valve has a little “play” in it. It wasn’t anything that could be screwed in tighter. Is this normal or could the valve have a crack in it? View attachment 165629
I'm curious how much space there is below your can.?

They have an extender that doubles the volume, but it's not clear if it fits the Transit.
 

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Can anyone tell me why the catch can is only installed on one side?

Why doesn’t JTL make one for the driver‘s side?

could it be worthwhile to install one on both sides?
I don't believe they offer one. They tested it, and determined the driver side is much cleaner due to the engine design and airflow from the crankcase.
 
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