Originally Posted by ComoLakeItaly

everything arrived in Italy too

fantastic job! thanks a lot!!!

Originally Posted by telum01

Sent!



Awesome! They offer two finishes (brushed aluminum and wrinkle black). I have the black on mine and it matches the intake manifold just about perfectly. You'll have the same manifold on your GT, so I'm recommending the black for your catch can. The aluminum is a very good match for the oil sump reservoir on the opposite side of the engine bay but I'm happy I went with black to match my manifold.

Originally Posted by telum01

If you have oil on your filters, it's likely coming from something near your airboxes so an oil catch can wouldn't fix that. Plus, this particular kit doesn't fit on cars with a V12 engine.

If there's enough interest for a kit for V12's I'll look into it and see what I can do. But I still don't think it'll solve your problem. That oil is likely coming from somewhere else.

Originally Posted by telum01

The purpose of an oil catch can is to prevent oil vapor from contaminating the air/fuel mixture that goes into your engine. The catch can I'm using is internally baffled, which helps force the oil from the vapor to collect in the can rather than continuing through to the engine. The vast majority of the catch cans you'll see for sale are not internally baffled, which is why they cost half as much as the one I'm using.

Oil vapor is one of the ways a car "consumes" or "eats" oil. (The other primary way is oil blow-by getting past piston rings and directly into the combustion chamber.) You can easily insert a recirculation line to reintroduce the collected oil to the oil sump. However, this oil can contain contaminants. It's worthwhile to inspect the oil when you empty the catch can to see if there's anything mixed into it (coolant in particular). As with any vehicle, checking oil levels regularly and topping off when needed is recommended. Most people know that some cars "eat" oil, but they don't know why. The catch can collects oil so you can actually see the oil that would be consumed. I keep extra oil on hand and top off with fresh oil, discarding what I drain from the catch can.

Oil consumption is fairly common with just about every car. Some do it more than others. Before getting started on my original kit, I rigged up a makeshift one from Home Depot supplies on my 4Runner. It quickly started collecting oil and showing its value.

From what I've seen on our cars, there are vent lines running from each side of the engine to maintain proper pressure in the cylinder heads. Excess pressure is released into the intake manifold (due to its nature, it has to be a fully-enclosed system, so it isn't vented into the atmosphere). The left-hand bank passes through the air-oil separator, then into the PCV (pressure control valve, if I remember correctly). The right-hand side, however, goes directly into the PCV. The PCV then vents directly into the engine. An air-oil separator (AOS) does the same thing as an oil catch can, but in a different way. It also recirculates the oil back into the system. But for whatever reason, we only have one cylinder bank passing through the AOS.

As for whether or not you need one... no, you don't need one. Your car will run without it, just as it has always run. However, the catch can does help. Removing the oil from your air/fuel mixture will give you a cleaner burn, improving your engine efficiency, emissions, and so on. Long-term, the cleaner burn will help prolong the life of your catalytic converters and O2 sensors.

Take all of this with a grain of salt, as those effects may not even be noticeable to you. The way I look at it, this is a fully-reversible kit and it does in fact prevent oil from getting into your intake manifold.

Hope that helps!