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Oil down the stems will be worn seals and possibly worn guides. Bill

Sound like a compression issue if I ever heard one. I would check that first, it sounds like its just a big air pump.

That's seems pretty normal, just condensed vapors being separated. The puegeot motors mini used for the 2nd gen turbo models were horrible for carbon buildup until a redesign on the crank case system and some programming updates addressed some of the valve overlap thru the vanos system which is...

Yeah that's actually really light and I doubt you would notice any drivability issue, we get engines in where you cant even see the valves only to top half of the stem. like I said I'm not even sure how prevelant the issue is on the lnf engines but I want the lower intake air temps and...

Its been my experience that some oil is going to make it thru the turbo system but a very small amount. I think a properly installed catch can can help with cutting down the oil going thru the intake trac but I personally wouldn't block off any crank case ports and don't expect a catch can to...

I'm not sure what the effect on the cobalt engines would be plugging it but on 2nd gen Mini engines its causes the crankcase systems which are internal to the valve cover to fail and you end up with an extreme vacuum issue internally and you start sucking in unmetered air past the valve cover...

There is really only few ways to eliminate the carbon issue with direct injection. One you can add an additional injector in the to the air path but this can be problematic or the easiest solution is a water/meth injection system to keep the valves washed clean. I work on direct injection...