crbnfbr

iTrader: (1)

Just changed my oil today after my usual 3,000 mile OCI, and this is the amount of oil in the OCC. I for one am surprised, and am glad I decided to do this mod. Because, all that oil would end up back in the intake plenum. I'd hate to see the amount of oil in the OCC for people who do 7,500 OCI

paperboy42190

iTrader: (7)

so this is the oil from the hose that connects to the intake right?

crbnfbr

iTrader: (1)

It's the hose by the PCV valve on the passenger's side of the vehicle.

paperboy42190

iTrader: (7)

Oooo okay. I wonder what are the long term effects without a catch can....?

crbnfbr

iTrader: (1)

Well, here's a pic of my intake plenum all nasty before I cleaned it out.

Turbonut

iTrader: (1)

^With a normal running engine, the oil mist is drawn through the PCV system into the intake, but I guess the main question is what does it hurt?

LaCostaRacer

That amount seems a little high based on my oil catch can fill. I usually have about 1/2 that amount at 7k miles. My car has 55k miles if that should make any difference.

I think I have the same husky container- what did you do to the bottom with the nut? I placed a nipple on the end of mine that has a valve. You nut idea looks a lot better for ruggedness.

crbnfbr

iTrader: (1)

I tapped a hole in the bottom and put JB Weld and a washer in there along with a 3/8" bolt. Just to make sure it wouldn't ever leak.

Yeah, the pic is deceptive. There was probably half as much oil in there as the pic shows.

d05bguy

From my experience... the engine will start to build up deposits on the pistons and eventually the ring landings causing poor performance and eventually low compression to excessive blow-by.. but this is over a long term and hard driving.. Another thing is that most if not all the members here are good with maintenance and prob don't have to worry about it till they get over the 120+k miles.. just my

pimpin-tl

Any details on how to do this mod?

LaCostaRacer

^ I believe you can find a listing in the Garage for oil catch can or try searching for 'oil catch can husky'.

It's basically a Husky air compressor filter with some fuel line hose. I have to pull my Wife's off so she can get a CA smog- it will fail the visual inspection in a Pilot but works great on the TL that has all the covers that hide it.

Turbonut

iTrader: (1)

Catch cans have been blown way out of proportion, so just think about the statement, if that were the case, no engine would ever see over 120k miles as all have the positive crankcase ventilation system, and today's engines last longer than ever.

crbnfbr

iTrader: (1)

Now you have me wondering if I should even be running the OCC at all. Especially, with my 3,000 mile OCI.

LaCostaRacer

I think a catch can gives you a idea of how much blow back is happening. I think it will also keep your intake cleaner as well. There are little channels and port holes that could block up over time and that probably is not good.

Having a catch can or not really has nothing to do with the OCI. The OCI relates to the life of the oil after a given mileage while the OCI catches blow back that happens regardless of oil life. You'll get blow back with a brand new oil.

I have two completely different results with the catch can on my two cars:
TL - looks just like the picture in this thread after 7-10k miles (I sometimes forget to empty it and need threads like this to remember). I have not removed the intake on the TL so have no idea if the CC actually keeps the intake cleaner than the picture.

Pilot - has a foamy rusty color stuff in it and has since day #1. The Pilot has 85k miles and runs great but that rusty foamy stuff has me a little concerned. I removed the intake of the pilot this year and it looked a lot like the intake picture in this thread.

Turbonut

iTrader: (1)

Also, some will add 2 cycle oil to the gas tank and have no problems, and yes, the 3,000 mile oil changes are a thing of the past.

I hate cars

Piston top deposits are so low that it's almost irrelevant.

Ring land deposits come from the crank case oil burning off in that very hot area. Going to a good ester oil will leave the ring lands looking brand new after a couple hundred thousand miles.

To everyone, I second what turbonut asks, what does it hurt? You have a plenum and 6 large runners. You're not going to plug up anything. You're not going to lose performance. The head port area is kept very clean by the fuel injectors. I would worry more about EGR than PCV.

That's not to say I wouldn't do a catch can just because but it's definitely not needed. There's a great discussion on catch cans in the turbo thread on the last page or two.

As for the large amount of oil, it can be from blowby but it's probably from an inferior oil. Look at the NOACK value of the oil, it's probably pretty high I would guess. I use an oil that has the lowest NOACK valuve of any street oil and I had almost zero oily residue in my intake manifold when I did a valve adjustment at 113,000 miles.

LaCostaRacer

^ Interesting point on the oil quality metric. I use Mobile-1 and it would appear to be at least 1/2 crbnfbr's amount at 7k miles. Crbnfbr- what oil do you use?

Based on IHC's comments, perhaps the Catchcan does a little good for those of us that don't run the low NOACK oil. It stands to reason, that there is a catchcan's worth of oil not going into the intake.

I hate cars

I looked up the NOACK values of Mobil One 5w-30 and it's between 11-13%. The oil I use is 6%. If you're using the 20wt the value is usually considerably higher but I couldn't find an actual value for any Mobil One 20wt. Just something to think about before worrying about the engine.

crbnfbr

iTrader: (1)

I've been using Motorcraft 5w20 for the past 80,000 miles, but I just switched over to Havoline 5w20. Since my Wal-Mart finally started carrying the 5qt jugs.

I hate cars

Switch to a good 30wt and the amount of oil in the catch will be cut in half.

crbnfbr

iTrader: (1)

Like I said earlier, the amount of oil in the catch can is deceptive. When you factor in the JB Lube, the washer and the bolt it's over 3/8" thick. So, there's probably only half as much oil in there as the pic makes it out to be.

As much as I respect your opinion "I hate cars" I think I'll just stick with the recommended 5w20. I used to run the cheapest oil I could find in my 90 Accord. It had 238,000 miles on it when I gave it to a friend, and it's still running like a champ to this day.

I hate cars

I did not mention engine wear. I just said if you want to reduce the amount of oil in there, to go with a higher NOACK oil which will come in the form of a good 30wt. If you look at what gets to the catch can its the lighter oil. Since yours doesn't have any baffling or steel wool the really light stuff is probably still making it to the intake manifold. As more of the lighter parts evaporate the oil thickens. Having the oil stay the same viscosity throughout the OCI is a good thing. At only 3k miles you can get away with just about any oil though.

In other words you're not capturing all of the oil vapors in that style catch. It needs a media inside of the can.

LaCostaRacer

Hi IHC. I'm pretty sure he has the same Husky filter as I use. This filter does have a paper-like filter which seems to do the job. I run 5-30 Mobile 1 and my level is pretty low- perhaps <3ml after 7k miles. I have never measured the level but just might next time.

I hate cars

Good. I didn't think it had any sort of "filler". I'm tempted to install one just to see any differences. I have almost done it several times in the past but after the valve adjustment and having no oil in the intake, backside of the intake valves PERFECTLY clean, and piston tops with the bare aluminum showing I would only be doing it out of curiosity.

I wouldn't mind putting one on the fresh air side as well just to see the ratio of full throttle vapors vs all other vapors.