2nd Gen R56 Cooper S Most liked posts in thread: 'Clark, is your house on fire?'. 'No, Aunt Bethany'....

Yep

Not being the most mechanically savvy I can't speak to the "why" of it. The short is that our cars produce allot of PCV gases which attach themselves to various parts of our cars as carbon buildup or outright sludge. This requires periodic maintenance to keep at bay (every 3-5K miles)

Much debate about installing oil catch cans has ensued as a means to alleviate as well

Do a search for 'Seafoam' on the sewing site for the methodology (don't think posted here). Seafoam is the product that is a solvent that helps break it down and turn to this nasty exhaust that my neighbor was so alarmed over.

As always feel free to ask questions here.

 

-Warm MINI is fine
-1/3 btl yes, watch video on sewing site, it shows using a plastic tube to feed from seafoam can in a more precise/measured fashion. Vacuum of engine will create suction. (one of the videos I saw showed pouring directly from can, I think that may cause problems)
-I let it sit about 10 min
-I started up MINI, it will rough going at first, then it will even out. I rev it a couple times and then take it around the block making sure I am doing high rev's on shifts. Do that until you don't notice as much smoke.
Repeat 2 more times.

You could very well do this at a park or away from the general populace to cut down on 911 calls to the local FD

Quite likely you will throw a CEL, I cleared them afterward and none returned

And yes Chuck I think it works, the degradation of performance is slow as it's getting sludged up but once you clear it out you will notice a immediate improvement in performance

 

Sorry Ric did not answer your other question- I don't believe feeding in through PVC hose into manifold plays any part with the oil system so no I do not necessarily follow up with a oil change

Right now I am 3K into my 5K oil change cycle and do not plan to alter

 

I do not have a 'can' on mine so I apply to same spot as on video. I would speculate you would apply on the 'out' end of the can closest to the manifold

 

I don't know if in fact but I would imagine in time the sensors would calm down and clear for you, not certain

To take a little of Dr O's thunder if you have a car with a OBDII port it just makes sense to get a reader, great in this instance for clearing false positives, but also a great diagnostic tool should it be a real CEL

 

Let me also quantify this that my MCS has coming on 70K miles. I understand this will not hurt you car at nay mileage but would seem to raise in importance the more miles u have on your ride

 

this is about my 4th or 5th time doing the procedure. I've noticed no issues

My cars response was much the same as Adam's (rough start, threw CEL, evened out)

As I said once cleared all is good and roaring like a tiger