I got it help please, 2004 G35 6spd/navi package. I going through oil like crazy. I live in NJ so local help would be nice.

 

Check your #6 spark plug tube (on drivers side) and if full of oil then u need new valve cover seal and i would get some thin washers to but under the bolts so you can increase the torque of the screw. ACtually just check all apark plug tubes.

Also you should do a compression test in all cylinders and if one or two are low do a leak down test, you may need new rings

Check you PCV valve is ok, check there is pressure getting to it via the line

Thats all i can think of at the moment.