Godspeed Oil Separator: Anyone Familiar?

Curious about this one too, from JDM:

UNIVERSAL BILLET ALUMINUM OIL CATCH BREATHER TANK/CAN | eBay

Not really sure these are the same as oil separators?

I've read on some other Mustang forums that people are using breather caps instead of the PCV system:

Breather tank or Oil Separator?

Of course, this is from a 2005-2010 V8 forum, so I don't know if the same would apply to our 3.7's at all.

Meanwhile, I'm digging around, trying to get my facts straight on these things.

Well, first off do you have a reason you want to remove the PCV sysem? Are you just worried about oil getting into the intake?

If you are just worried about getting oil into the intake, just get the separator.

To be honest, I do not think that the 3.7L's get as much oil returned back into the intake as the 5.0L. I just checked my oil yesterday (I have almost 4,000 miles and I changed my oil at 1,000 miles) and the oil level is exactly as I set it before.

Also, the crank case ventilation in the low end of these newer engines are soooo much better than previous engines, especially the 5.0L's.


As far as my knowledge and reasoning goes, replacing the the PVC system is a misake on a daily driven vehicle. The only real reason to get rid of the PCV system is to make more power and you don't do that by using just breathers. If you are on that boat, get a vacuum pump and get some negative pressure under those rings as well (8-10inHG will do ya)!!! Breathers are a lazy way to get rid of PCV and/or oil getting into the intake. With breathers you then rely on the engine to push out crank case gases and you really don't make much more power than a good PCV system with a separator.

I realize those options are cheap but not sure of the quality. The JLT catch can is on sale this month for $107 at AM and that's what I have. It looks like it belongs in the engine bay and uses stock connectors. The catch can does collect oil and I'm glad I have it. I empty it out every 3000 miles and would say it's typically half to 2/3 full at that point.

I went with the JLT too, it simply snaps in place using the same tubing and connections as the stock PVC line, and it does collect about as much oil/gasoline as the 5.0L. While to doesn't remove 100% of the blowby it does collect around 80% of it. I've had valve train / intake fouling in my other cars over the years, with the oil catch I should have less trouble from 50,000 miles on. The catch can does need to be emptied at least every 3000 miles, I believe JLT recommends checking it every 1000 miles, I usually empty it every 2000 miles.

http://www.allfordmustangs.com/forums/2011-mustang-talk/284253-oil-seperator-catch-can.html

740weapon said:

These products will not improve engine longevity.

They may however screw up at some point and cause you problems with back pressure wrecking seals.

Click to expand...

Sounds like someone with personal experience. This puts me back on the fence, as I was about to pull the trigger. It seemed reasonable that the filtering action would actually remove impurities, but if it's going to destroy seals with back pressure, then it sounds like a hyped up gadget.

I definitely need some elaboration.

Hoosier Daddy said:

Google is our friend.

Installed a PCV oil separator - Bob Is The Oil Guy

Click to expand...

Unfortunately Google only gives us part of the story. We need the forum, so that we may hear first-hand experience from someone who has used these things and have either had success or experienced failure.

Ole Bob the oil guy here seems to be happy, but I wonder what the long-term outcome will be? Is he actually causing more harm than good with that thing?

Not trying to kick back or stir the pot. Just trying to sort out the facts on some of the gizmos out there.

I too am waiting for something of substance from 740weapon on his statement.

What I know is what I can see, and that is these things really catch oil that otherwise would have gone into the intake.

JLT recommends cleaning the filter every 5000 miles or so. I simply spray it down with some gunk carburetor or citrus cleaner to keep it clean.

Oil catch cans have been around since the heyday of Hot Rodding in the 60's & 70's. Never heard of anyone with an oil catch can related failure. There probably have been some, due to the can completely filling up, then dumping oil into the intake, or interfering with crankcase ventilation. The filter clogging (over 10s of thousands of miles) because of never being cleaned is another possibility.

I believe as long as you maintain the filter & check the can every 1500-2000 miles or so, you won't be at risk of an oil catch related mechanical failure.

The JLT separators look like a very quality product. I was going to get one, but right now it is not a priority to me.

One of the reason is that I still question how effective they really are on theses engines. The reason is because most of the cases I have read, people install them when their vehicle is practically brand new... well for the first 1000-2000 miles I would expect there to be more blow-by than the rest of the engines life due to the break in period...

Does any who has had theirs for a while emptied it after say 2000 miles on their engine checked it at say 4000-5000 miles (2000-3000 miles later)?


I can also understand the previous statement about the component possibly getting plugged. Owners will need to reall watch the filter that is in-line to this system and will have to avidly watch the o-ring seal for degradation, causing a leak.