Thanks to Scott's query, I've found you guys on this forum, and it's good to see some people aware of this problem in modern diesels. I believe in it so much I started a side business, and the whole aim is to help find some solutions to things like blowby, EGR and the dreaded DPF filters you guys are still avoiding for now. If you have a modern diesel, a Provent is just about the best thing I could recommend you fit.
Sure I plug these things, but you can get a Provent anywhere, as well as the 42DD cans, readily available in the USA. I care more that you guys seriously consider fitting a can, for the sheer amounts of blowby I have found in my 2.0 VW TDI is more than I've ever encountered in V8's etc. It looks like the Triton plumbs the oil blowby in pre turbo, so you then proceed to coat the entire innards of your intercooler with oil, and this does indeed reduce the efficiency. Of far larger concern is when that blowby mixes with the EGR and forms an oily sludge that builds up considerably on your inlet mainfold, and in the Euro cars it does everything from reduce the inlet runner size ( read less power, reduced economy ) to jamming swirl flaps and electrically actuated parts like the EGR valve itself. Sticky EGR valves and anti shudder flaps are causing all manner of problems, and the service centres across all the brands are all too aware of the blowby sludge problems.
When you guys eventually get DPF's, they can regenerate the soot and last quite some time, but oil ash builds up permanently in them, and once they are blocked, that's it. For DPF cars reducing oil ingested by the engine becomes twice as important, as even though VW charge ludicrous amounts for a DPF, I can't see anyone doing a Platinium coated Silicon Carbide matrix cheap.
Rubber hose from supercheap will do fine, but silicon is the best for oil resistance but 4 times the cost. Also only comes in pretty colours like blue, I'm still trying to find it in plain old black. Please do your best to avoid bends and fittings, as it's all about flow, and I noticed one can in the pictures above quite close to the turbo; the cooler you can keep the can, the more oil will condense. The Provent has a 1psi relief valve, so if it ever clogs or pressure builds up it vents to atmosphere, so it is indeed really THE only choice for the diesel engine. Backpressure in the blowby system will lead to oil being forced out your turbo bearings, mainseals and even past the piston rings, and it's a well known trick in the MX world to upsize your crankcase vent to up the power, by reducing the pumping loss. Plumb with flow in mind!
Finally cans all come down to their mechanical maze that helps condense the oil, and the 42DD ones both have the same innards, but even then they are really only suitable for petrol with it's lower blowby in my humble opinion. They have the upside of no ongoing maintenance, so in the very least consider a can along those lines. Most cans on e-bay and at supercheap are simply empty cans, but be very careful filling them with pot scourer etc, you simply don't want ANY backpressure. Been there, tried that, failed!!
Better than nothing, but at about the same cost as the basic Stealth 42DD can, the Provent is the go. Western Filter in Sydney have them, Active Air Spares and me up here in QLD ( I get mine from Bob at Active ), and if you go on the Mann and Hummel site, you will find the stockists in the various states.