Who has an oil catch can in their car? I've had one since early this year. Emptied it out for the first time last week. It was holding about 1.5cm of oil. So it looks like it actually does work.

Out of curiousity - has yours got a breather on top and no return line?

Out of curiousity - has yours got a breather on top and no return line?
No breather as i don't want oil possibly venting into the engine bay
Mine has a return line back to the intake

Forgive me in asking this, but why do you guys require an oil catch can for?

Forgive me in asking this, but why do you guys require an oil catch can for?
stops your breather lines blocking up?

Best to remove the liquid component of the crankcase blow-by at the very least. The gas component of the blow-by is pretty nasty at REDUCING octane when returned to the inlet = detonation and bad things.

Forgive me in asking this, but why do you guys require an oil catch can for?
The more shiney things with hoses coming off them = more power.

Still gotta get a new one, if anyone wants a brand new catch can with fittings $20 PM me. Monza one...

Hard to work out a catch can plan when you have 4 outlets on ya rocker covers:rant:

']The more shiney things with hoses coming off them = more power.

Still gotta get a new one, if anyone wants a brand new catch can with fittings $20 PM me. Monza one...

Hard to work out a catch can plan when you have 4 outlets on ya rocker covers:rant:
dualiess! hook us up with a pic in PM tuffy, i want one so i might take urs

dualiess! hook us up with a pic in PM tuffy, i want one so i might take urs

I'll get pics soon, Will let you know.

Humm, instead of having the catch van vent go back into the inlet or vent into the engine bay, could you just run a small tube down to behind the engine bay?

Humm, instead of having the catch van vent go back into the inlet or vent into the engine bay, could you just run a small tube down to behind the engine bay?

Yep.

Very easy to do. Just pray the EPA doesnt find out - very, very large fine.

You could have it fed into a charcoal canister......but anywho.

Forgive me in asking this, but why do you guys require an oil catch can for?

Taken from option imports:

:Oil Catch Tanks collect the oil, moisture and blow-by gas that causes carbon and sludge build-up in the intake system and engine to keep them clean even under the hardest driving conditions. An oil catch tank is also an excellent engine dress up item that will give your car a racing image.:

idealy the catch can should return to the crankcase, via the bottom of the can (gravity return)

this way you dont have to throw/empty the oil out but if you engine doesnt have it, you would need to tap a retun line into the sump area, somewhere above the oil when its in the pan. Nice and legal too

idealy the catch can should return to the crankcase, via the bottom of the can (gravity return)

this way you dont have to throw/empty the oil out but if you engine doesnt have it, you would need to tap a retun line into the sump area, somewhere above the oil when its in the pan. Nice and legal too

That's tarded, then there would be no where for expanding gasses to go.

That's tarded, then there would be no where for expanding gasses to go.

Sorry, but huh?

The oil catch can relieves crankcase pressure. The air goes back to the inlet, or into a charcoal canister, or through a little filter (which is still illegal).

The oil is gravity fed back into the sump.

Sorry, but huh?

The oil catch can relieves crankcase pressure. The air goes back to the inlet, or into a charcoal canister, or through a little filter (which is still illegal).

The oil is gravity fed back into the sump.

Sorry I read it as

Rocker cover ---------> | | catch can -------> sump

With no venting going on at all, me being tarded.

Now, from my limited knowledge on motors etc, the oil residue going into the manifold would be a good thing as it will keep some lube on the TB butterfly, as well as valves etc.


Btw the sprintex has done 18,000k's i pulled to top lid of and no gunk at all.

The option imports description isnt the greatest.

Oil catch can is used to relieve crankcase pressure, which will include some oil/blow by gasses. This is then seperated into air/oil and returned to where it should be.

As for if oil residue into the manifold is a good thing, not sure so wont comment.

there is a growing belief that uppercylinder lube, whether in this prtext of using oil/air or for say cars running gas is like snake oil...

when people started running gas they realised hell our valves were wearing out, petrol must lubricate the valves where as lpg does not. petrol doesnt lubricate them it just lubes better compared to no lubrication from lpg. A big problem with older engines, al predominetely poorly built ones that people ran on gas to save money (usually commos and falcons) is they suffered badly from valve float from anywhere as low as half their rev range (with age) so when people put them on gas, and thye feel a power loss, they are driven that little harder, and put into this valve float zone more regualrly. There are now some excellant vids on youtube that show valvefloat, there not only does the valve bounce in its seat, it actually twists around like a corkscrew in its seat, which in turn causes a lot of valve and seat wear. This is where lubricating the head would help, but and engine shouldnt do this and its been alleged this is where the whole "upper cylinder lubrication" movement started.

I know this is for LPG mostly but its more just an insight into the rationality of necessity. Ultimately anything entering you inlet other then fuel or air is not needed. (unless you run a rotary, sometimes a little oil helps)