Quote:
Originally Posted by mirob
From what I understand, the oil in these vent pipes serves to lube the snails. Not sure if actually true because a lot of guys, across numerous platforms with BMWs turbo engines, install catch cans to capture the oil. As far as I know, they have zero issues with turbos not being lubed. So there's that...
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I highly doubt these tubes provide oil for the turbos. Yeah I've noticed that too about BMW owners installing oil catch cans and completely agree with it since most are looking for performance upgrades. I think if most people see the fumes that come out of your crankcase, even after being filtered, they will probably consisder an oil catch can instead of a CAI as their first mod. Though most setups that people run are bad for the environment.
Btw, with how fast turbo impellers spin and the amount of heat it builds up, I think nearly all turbo systems need oil for lubrication and cooling.