I bought a 08 g35x last year in January.
The car has been great minus some various small issues I've found due to the prev owner.
I've noticed that it did tend to use about 1/2 q to 1q of oil between changes.
I check the oil regularly after reading the older vqs tend to use some oil up.
Well, the other day I noticed it dropped about 1Q so I added some more to it.

A few days later it was nice out so I cleaned up the bay, check the fluids.
Realized the expansion tank was a bit low filled it up. Opened up the rad cap to find some chocolate milk at the top. After a small nervous break down I soaked up what appears to be oil. Topped off the coolant and noticed the oil was a little low again. Filled it up again.

Started the car with the cap off, and I can watch drops of oil appear at the top.
No overheating. Car pulls hard without a problem. The only thing I've noticed since I bought the car was a slight pulse in the idle on occasions.

I have very little hope that its anything aside from the heads or HG. But I've also read about the oil cooler gasket can cause this issue. A friend also said to check to see if there was a cooler built into the rad for the trans but this appears to be motor oil to me.

Any ideas? Does the HR have the oil cooler/warmer? Or only the DE?