No smoke issue on my 4.8iS

I use Total full syn( Elf )oil 108k w/ no smoking issues .5k oil change intervals

I just bought mines used.. Yes it does have blue smoke and oil residue in the throttle body.. I posted about a ccv and air hose diagram to trace the leak. Seems no one has one.

It runs great for the most part, but smokes a bit at extended idle.

If I bought this new I would never change oil at 15k miles.. It be around 8k with full synthetic.

OP you should change this thread into a POLL.

Fromm reading online alot of people have this issue and no one can find a true fix with out new valves. My logic tells me to fix the consumption through the throttle body first..

I read people instlled a catch can and smoke from extended idle are completely gone.

I dont know what oil bmw uses, but are you guys saying that you are using a different type of oil than what BMW uses at the dealership?

since I purchased my 4.8is in i think june, i did the oil change once at a german independent shop so im not sure what oil they use. my truck doesnt currently has the blue smoke issue however, but since its talked about on here so much, i wonder if its just a matter of time before it starts to blue smoke.

You don't have to use BMW branded oil, just use one that meets the BMW designated spec. FWIW, the Mobil [1] 0-40 European Car formula is a BMW approved oil.

Why are you changing your oil every 500 miles? Is this a track use only vehicle?

Got 134k on my 4.6is and no blue smoke.

TiAgX5, I'm pretty sure he meant 5k, not .5k. But maybe not... :)

ANY vehicle will smoke over time/miles.

A MAJOR contribiting factor to smoking is improper maint and overheating. Driving an overheating vehicle will allow the head temp to rise to a point where the valves are not sufficently cooled (the valves cool by transferring heat to the head while seated), when the valves/cylinder heads overheat the valve stems heat too, valve stems seals are subjected to temps beyond the intended design/materal maximum. The result is reduced plyability/melting of the seals, and blue smoke.

With the fact that most first owners of Xs have children, and 6 yr old E53s are only worth about 1/3 their MSRP, many first owners will not sell/trade and toss the keys to Jr when he starts to drive (parents like their kids in big/safe vehicles). Most new drives don't know ANYTHING about proper maint and think that no matter how many warning light are lit, if it's still running it must be OK to just keep on driving. This is why full service history, limited # of owners and PPI is a MUST. Don't get me started on auction purchases of BMWs, you can't even drive what your buying and if you can't do serious DIYing repair costs can exceed vehicle value.

Another red flag when looking into the blue smoke issue on a used X with no service history is the possibility the prior owner brought the vehicle to an Iffy Lube. These shops do not use long life oils (a HUGE no-no when following the SII for service), the non-LL spec oil will not last. Iffy Lubes don't stock BMW filters too. Some used BMW purchasers doing their first oil changes have found fragments of the filter in the canister or even no filter at all! Unfiltered oil will cause severe engine wear in almost no time.

If you have oil in the intake - it can only be caused by a defective CCV system or excessive crankcase pressure. Oil in the intake should not be considered normal and reduced to as minimal amount as possible. From there you should look for other engine problems if still concuming excessive oil.

The CCVs adjust the vacuum accordingly (if they work as designed) - They are vacuum actuated with no outside influence other then crankcase pressure.

The pressure control valves regulate the crankcase pressure to a low 0>30 mbar.
N62 = 22 mbar vacuum
N62 TU = 25 mbar vacuum
20" (Torr) = 26.66 mbar vacuum

Yes, every 5000 miles. Every mile on new oil means it is not as good as when it poured from the bottle. I say at 5000 miles, it is a small investment to change the oil and filter. I am not saying anyone should do the same thing but there is no way to know if it is obsessive. There is a way to know the oil was not as good coming out as it was going in even after as little as 1000 miles, including synthetic.