928ntslow

As stated, this is completely normal. Forget about it and just drive it, nothing will come of this. It's not really so much the blow by, but the oil pumped to the top of the heads that is ingested because of the venting to the intake system, which then pools/collects in the cavities at the bottom of the TB. Hard driving usually recycles these vapors back into the engine and ends up blowing it out the exhaust. Normal driving does not allow enough vacuum into the cylinders to remove what has collected in the bottom of the TB. The vapors/oil particles, settle and return to liquid form. This is why when you drive normally and then punch it, the vacuum created, pulls all of that oil back into the cylinders. Of course there is more oil than can be burned at one time in the firing and what you end up seeing is the grayish smoke. I just do a hard acceleration every now and again to remove what has collected down there. You will find that if you do this at regular enough intervals, this (sometimes embarrassing) issue will be lessened. These are high compression engines with a 10:1 ratio...just pull the air box and start the car if you want to hear what serious suction sounds like...hence the insulated intake tubes.

ROG100

All the GTS's I know do that. Some more than others.

sidehatch

Dont worry about it,its funny everyone said the same advise i gave,opposite yours.hmmm

Jim M.

As others have said, completly normal for a GTS. Mine did it a lot with the addition of the x-pipe. The issue is the reduction of back pressure added to the fact the oil bypassing rings etc. I added screens to the air/oil seperators in the cam covers and lengthened the hose from the cam cover to the rubber elbow at the base of the MAF. Both helped, but neither has completly fixed the problem. I've chosen to live with it. When I finally hit 80K miles it was like the rings finally seated and now it's almost non-existant.

andy-gts

The sc kit did away with the hose return to the elbow below the MAF. Is there any other return to the intake? If not I am sure pulling oil past the rings then

drnick

all 928 engines will burn oil if you rev them when you drive, some oils are worse in terms of getting sucked through into the intake and burned. my opinion on why the GTS engines are worse than the earlier cars is that the crank is bigger and so rotates even closer to the sump and lifts more oil into the crank case which then gets sucked out under vacume and burned.

andy-gts

this discussion has helped to calm my fears! Thanks Guys!!
andy