Crankcase breather leaking oil

I am afraid I am not very familiar with many very modern engines like this for detail, but no-one else has responded to you in some days. Principal is all the same. Mostly oil loss through breather and crankshaft seals et cetera is caused by compression loss past the rings, but you need to check before you do anything drastic. You could try replacing the breather with a connection to a pressure gauge of say 20psi range, and note if the pressure builds up, and whether the needle fluctuates, flickers, or is steady. You should see the greatest variation at idle speed; and that will vary between perhaps one or all cylinders having abnormal compression loss. You practically always get some compression loss past the rings, but with modern gapless rings properly fitted and seated it can be very small.

The other thing it is worth trying is to seat in the rings as you do with a new or reconditioned engine. The process involves taking the car on a stretch of road where your changes in velocity wont bother other motorists. In top gear let the speed drop right down, say to 20mph, then open the throttle wide without changing gear till you are up to 60 or so; then repeat and repeat while you have patience. This de-glazes the bores and seats the rings. If you are so unfortunate as to have an automatic transmission, obviously the problem may be more difficult. I hope this is some help to you.

Ivan Saxton

I agree with Ivan here!!! I believe that your oil loss is caused by leakey piston rings!!! When the engine is runing at idle & hot do you see or feel any puffing or pressure out of the breather??? If so...Your rings are leaking and blowing oil out the breather!!!