Anyone using an oil catch can in there Mustang....?
A small amount of the combustion gases pass the pistons into the crankcase, (blow-by). Using a "catch can" can help prevent carbon deposits, gunk, and reduce the likelihood of knock and pre-ignition by removing oil contaminants introduced in the intake. Or so they say. I have also heard you get more "blow-by" when you run your engine hard, verses a person who drives there car in a moderate manner...
I currently am running duel Bob's Auto Sports cans on my 14 GT. One on both sides. In the four years I've owned my car, I have had several different cans on this car, mainly to see what seemed to be more effective and because catch cans kind of became an interest of mine.
In my use of different catch cans over the years, the Bob's can seem to be the best IMO and I base that on the fact that I have the least amount of oil sign at the fitting after the can. I always find just a very slight oil film. On some of the others I've used, I have found liquid oil sitting inside the fitting which indicate to me that the interior design of the can is not as effective.
I was using the Ford Racing cans for about a year and a half but I switched back to the Bob's cans because I was finding liquid oil in the fitting past the can on the passenger side can and because the FR can is not as easy to drain as the Bob's can.
The only reason I'm using a can on the driver's side is because I found traces of oil in the factory line going to the intake tube and I had a spare Bob's can so I installed it. I don't think I will ever find oil in the can itself but I feel better knowing that I'm getting some filtering on that side. It's probably not really needed.
Just for information purposes, I have used these cans on this car.
UPR original design- not very good IMO because I found lots of liquid oil at the exit fitting even though the can caught quite a bit of oil.
Bob's Auto sports. - Best can of those used for the reasons stated above.
UPR's first four chamber design.- Not impressed as I found a lot of liquid oil in the exit fitting.
UPR's second four chamber design.- Much better but not as good as the Bob's.
RX can. Good can with a little more signs of oil than the Bob's can.
Ford Racing can.- I love the factory look but was disappointed in how much liquid oil I found in the exit fitting.
I will say that all of the cans I have tried seemed to catch about the same amount of oil so they all were doing something.
From here on out I will stick with the Bob's can for the effectiveness and the ease of draining. Who knows if in the long run it will even make a difference but it makes me feel good that I think I'm helping the engine out. Who knows if I even keep the car long enough.
I always found it kind of amusing that everyone says their catch can works great because it caught oil (myself included...) when really we have no idea how much it is catching vs how much is still making it through.
For a long time I figured I'd prove a point by running two cans in-line and testing how much residual oil made it into the second can, but I never really had the funds or effort to put a few thousand miles on a few different catch cans. Luckily I just stumbled across this video.
I don't 100% agree with their testing procedure, as I think 20 psi is a little excessive, however, I can see where they were going with the attempt to get speedy results, and the results still do speak for themselves...
This is why I always tell people to periodically pull the line that goes into the intake manifold to see if you see liquid oil sitting inside the fitting or not. If you do, in my opinion, the can is not doing a very good job no matter how much oil you find inside the can. My Bob's can does not let liquid oil past the can, only a slight oil film. A slight oil film is probably the best you will ever see out of any can.
Here's the test that I performed on my Ford Performance separator.
I introduced a small amount of Zyglo florescent penetrant into the engine oil.
It won't hurt the engine. It's used in aircraft engines all the time. If there was any oil getting past the separator, it would glow under a black light. The tube going into my engine showed no trace of oil under the black light. The separator is doing it's job.
Here's the test that I performed on my Ford Performance separator.
I introduced a small amount of Zyglo florescent penetrant into the engine oil.
It won't hurt the engine. It's used in aircraft engines all the time. If there was any oil getting past the separator, it would glow under a black light. The tube going into my engine showed no trace of oil under the black light. The separator is doing it's job.
I had the opposite result using the Ford Racing separator. I ran mine for about 1,200 miles and then took the separator off. There was liquid oil sitting inside the quick connect fitting that connects to the intake manifold.
Yep, I use a passenger side one.
Usually catches about a tablespoon of oil every 250-300 miles.
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