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So, I gritted my teeth about 1200 miles ago and bought the JLT catch can. Geez-o-pete! Look at all the oil that did not end up in my intake manifold!!
 

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I would say that is about normal. Some have more and some about the same. The harder you run it the more you get it seems. I check mine about every few weeks but then I don't use mine for a daily.
 

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How bad is that oil really? It's not like pouring that much oil in all at once, since it accumulates over 1200 miles. I only ask because Ford clearly didn't think that was an issue. Could someone with more engine experience explain the harm this would do if the catch can were not installed?

Thanks!
 

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The oil will not be an issue during the warranty period and that is the only thing Ford is concerned about. I don't think that amount of oil will cause any abrupt failure however, it can't be doing the intake any good over time. Is it necessary? No, but I feel better with one. I am not an expert so will wait for someone with more experience to comment...
 

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I check mine about every 1000 miles and this is what I get each time. Mine is a daily driver where I drive about 30 miles each way to work with the cruise set at 60 mph.
 

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It's too bad these motors are so new. I'd love to see a comparison of some spark plugs or valves after 100,000 miles with and without an oil separator.
 

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That is supposed to lubricate cylinder #8... :gringreen
 
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An oil catch can is used in turbo applications, or high-performance race applications where excessive blow-by (leakage past the piston rings) of air and fuel vapor occurs. This creates a positive pressure in the crankcase. Engine manufactures have placed a valve on the engine block which releases this pressure. This valve is known as a PCV (Positive Crankcase Ventilation) valve. During engine operation, blow-by gases, as well as oil mist from the rotating components of the engine, pass through the PCV valve and are routed back into the intake for the engine to burn off. However, some of the oil mist and other products settle along the engine intake and over time form a "gunk." The oil catch can collects the oil mist and condenses the fuel vapors while allowing "cleaner" gases to be passed back into the intake. Typically the blow-by gasses are passed through a wire mesh, which give the vapor droplets something to adhere to. Since the oil catch cans condense the vapor portion of the gasses, they will need to be drained periodically of all the oil, fuel and other contaminants.
This sounds like a good explanation?
 

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This sounds like a good explanation?
That's a great explanation, thanks Mach! That explains why it's more important with forced induction, because that'll cause greater crankcase pressures, and likewise with sustained high RPM running. Thanks for sharing that, now I might have to buy one!
 

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That's a great explanation, thanks Mach! That explains why it's more important with forced induction, because that'll cause greater crankcase pressures, and likewise with sustained high RPM running. Thanks for sharing that, now I might have to buy one!
I have one i just bought because i broke a fitting and i got pissed. lol called JLT and they hooked me up with some fittings...Anyone interested i'll sell it to them for $115.00 free shipping still new in the box its the black passenger side. PM me!
 

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Just got my JLT package yesterday. Need to hook it up tonight. Not a daily driver so I didn't rush to install it last night. Can't wait to see what it catches.
 

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This is about 3k miles of driving after a fresh oil change. I don't drive crazy and maybe 500 miles a month. No mods other than air intake tube and air filter (basic stuff, not a cold air intake where you rip everything out and put in a cone filter blah blah).

Several spoon fulls and it's the new JLT 3.0 can.
(2014 3.7L V6 manual)
 

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