Most of what has already been said here is pretty good advice. I agree with a couple of the guys that you need to isolate what is causing the problem. A little leak by the valve stems is not a big deal and the engine may run fine for some time.

If it is a broken piston ring (will be detected by leak down and/or used oil analysis) it needs to be fixed.

If it is the turbo seals you will also want to fix those before running it too hard or permanant dmage to the turbo bearings will eventually occur.

I have used oil analysis kits in stock in Clearwater for $25.00. How this works is you take a sample (about 4oz. Jar included in kit) of the used oil (acquire during oil drain) and mail the jar (postage paid mailer tube also included) off to a lab in Cleveland. The lab does a spectroanalysis to determine wear and contamination. The results take about two weeks to get back but it will tell you if there is anything abnormal (like a broken ring, spun bearing) going on in your engine that is causing your extra oil consumption.

Don
www.lubedealer.com/dstevens