I guess the smell of burnt oil which I reported earlier had nothing to do with my CCV mod. I replaced the valve cover gasket a week before the CCV modification, I guess there's a light oil leak somewhere, not related to the CCV.

There's a guy on Youtube, Eric the Car Guy, who says that if your car burns a lot of oil and you do this CCV mod, the car will need a couple of hundred miles to burn off the remains of the oil that were in the intake and other parts. May be true as well.

I've done this

Can I get some long-term feedback from people who have done this modification?

1. According to "mlody" from different forums, he did all kinds of CCV mod, and eventually had to replace the pistons rings (all 3 rings), and only this (replacing the rings) solved his oil consumption problem.

2. Now onto this mod. When you look at the Duralast PCV Valve shown on the first page, it is basically a valve with spring inside, once the vacuum reaches a certain point, it opens up allowing vacuum to to suck air into the I.M.
In a way, this design is similar to the BMW stock CCV Valve (which also has a spring). Perhaps the Duralast spring has different design (different In Hg when it opens).
Can some gurus explain why the Duralast PCV valve is better than BMW spring?

- What is long-term report on oil consumption using this mod (or similar mod)?
The more I read the more I get confused.

cn90
2006 X5 M54 6spMT with 122K miles and 1 qt every 500 miles!

The CCV regulates flow to maintain a certain level of vacuum in the crankcase while the PCV just regulates (basically 2 positions) flow according to how much vacuum(level) is in the intake manifold. Completely different. Plus the CCV also uses a cyclone to seperate the water (and oil) droplets and return them to the crankcase.

Sorry I didn't make myself clear.

I know exactly what PCV and CCV mean. But that was not my question.

I am ONLY interested in long-term report: after some 5000-10,000 miles AFTER doing this mod by BavarianE39, what is the oil consumption BEFORE and AFTER the mod. If people can post the following info, it'd be great:

- Year/Model/Trans/Mileage (example: 2006 X5 M54 6spMT with 122K miles).

- Oil consumption BEFORE mod = _________

- Oil consumption AFTER mod = _________

See this thread

http://www.bimmerforums.com/forum/sh...umption-Solved

And this thread who has done it first
Long back
http://www.bimmerforums.com/forum/sh...tal-in-10-mins!!!

And here is you'll see another setup and mileage and cars running on this setup
http://www.bimmerforums.com/forum/sh...c-Heavy)/page4

Thanks but I have read all the threads related to M54 engine oil consumption.
It seems that mlody (aka "Elbow Grease" on youtube) eventually had to rebuild his engine using new piston rings as in the video below:



https://www.youtube.com/watch?v=fLJGoCuNDzo

But I think people are changing this ccv even me cause it's failing prematurely cause if that rubber piece inside got damaged cause of oil :(
So they shifted to this mods
Or do you think this modification make him rebuild his engine ?