Yes - You Need an Oil Separator | Your Valves Will Thank You

[2001Bullitt]

Curious if he was getting that much why he would take it off allowing it into the engine

Yeah it doesn't hurt it just like that oil blow-by doesn't hurt it. But it doesn't make it a great idea either. If you were collecting it, it was doing its job.

Eh, I think it’s more just pushing a small amount of condensation through but it’s my daily so it collects fast. Like I said, no issues on the other 2 vehicles. Just the coyote

 

[SID297]

So how critical is this on the newer engines with PFDI which is a combination of port and direct injection? Doesn't having fuel in the intake tract reduce the tendency for coking? I suppose getting the oil out of the intake tract is still helpful from a performance perspective...

So that's an interesting point. It comes down to the tuning of the particular vehicle. From the factory, most Fords only use the PFI to clean up emissions. Often it only fires 20% of the time. The result is the DI system still allows the valves to get crudded up, but just a hair less than a DI only engine. Moral of the story, if you want clean valves without an oil separator build your engine to run E-85 through a carb.

 

[Lambeau]

Cliffs:
Among other factors, outside air temperature makes a big difference in the accumulation in the Oil Separator's can.

I'm still a little miffed between the accumulation volumes I get in the cans.

Following pics are both from JLT/OSC Oil Separators on my vehicles for comparisons and discussion:

Accumulation after just 116 miles during the winter (December) '19 Explorer Sport 3.5L EB.
Almost all water.
About 0.25 ounce?

Same with light on it.

Here's why I'm a little miffed. Again from my Explorer, but 2,600 miles.
(January - mid March)
About 0.75 ounce?

Accumulation after 2,876 miles (June-October) on '20 Mustang GT 5.0L. This Oil Separator is mounted on the passenger side of the engine.
All oil.
About 0.5 ounce?

 

[03cobra#694]

Like I told you @Lambeau. I get about a teaspoon between oil changes on mine.

 

[CobraBob]

I'm interested in finding out how much I'll accumulate with mine. I'll be installing it Saturday afternoon and then I'll check it after 500 miles.

 

[SID297]

I'm interested in finding out how much I'll accumulate with mine. I'll be installing it Saturday afternoon and then I'll check it after 500 miles.

Run some cheap no-name oil if you want to collect a lot.

 

[CobraBob]

I didn't say I wanted to collect a lot. I'm hoping that I collect a minimum, as in maybe a teaspoon+- between oil changes.

 

[2014gtcs]

Do the experts recommend one on a 14 GT, it has only port injection? Do they make one that does both the passenger and driver side? Or do I need to purchase one for each side? I changed the plugs at 20k miles and the plugs were all the same tanish/brown color, no oil that I could see. Vehicle currently has 22k miles.

 

[SID297]

Do the experts recommend one on a 14 GT, it has only port injection? Do they make one that does both the passenger and driver side? Or do I need to purchase one for each side? I changed the plugs at 20k miles and the plugs were all the same tanish/brown color, no oil that I could see. Vehicle currently has 22k miles.

I run them on everything, they are just more important on DI vehicles. Some only need a sep on one side. Best to ask the manufacturer and current owners for their recommendations on if you only need one or two.

 

[2014gtcs]

There's only suction on the passenger where it's connected to the pcv valve, no suction at all on the driver's side. So I guess it would only make sense to install one on the passenger side. I pulled it off while running some serious suction, installed it and ran it pretty hard for about 30 minutes and pulled off the hard line from the pcv to the intake and it was dry. I ran a clean towel as far as I could inside and barely anything. I'm gonna pass on a separator, jmo.

 

[CobraBob]

A 30 minute check isn't much of a test, @2014gtcs.

 

[2014gtcs]

I guess you're right, I will eventually install one and tie in the driver's side with a T, with the catch can on the passenger side. No need for two of them.

 

[mysticsvt]

I guess you're right, I will eventually install one and tie in the driver's side with a T, with the catch can on the passenger side. No need for two of them.

Another bonus is monitoring. Just because your car's rings are good now doesn't mean they will not wear. Peace of Mind

 

[CobraBob]

I guess you're right, I will eventually install one and tie in the driver's side with a T, with the catch can on the passenger side. No need for two of them.

I love how easy they are to install.

 

[2014gtcs]

Went with the J&L passenger side separator, had to wiggle it in to get it to sit flush and had to pull the head sensor harness pushpin out so the canister wouldn't rub on it. The canister gets pretty darn hot and after a couple hours of spirited driving nothing, not even any film in the canister. Does anyone make one that's made from composite material? Similar to the stuff my intake is made from, this material hardly gets warm.

 

[beefcake]

I always recommend running a catch can. Boosted or not! I offer a wide range of them for every set up. HMU if you need one or have questions on which one you need for your set up!

 

[SID297]

I always recommend running a catch can. Boosted or not! I offer a wide range of them for every set up. HMU if you need one or have questions on which one you need for your set up!

We have another vid coming up soon that fully shows the importance of running one on a Predator engine.

 

[kevinatfms]

Have J&L on my 2021 F150 2.7, wife's 2021 Explorer ST. Have a Mishimoto unit on my Fiesta ST. All three are excellently designed pieces and use OE connections.