[M6ORL]

Hello i know there's a lot of information about this on the forum but i wanted to open a thread for my specific case.

The car is sitting at 70k miles i bought it with 52k and change the oil every 3000k miles with amsoil 5-30 , stock engine and i barely push the car mostly just cruising.
Seems like the car is consuming 1qt every 800 miles which i think is insane and maybe there's something wrong with it i want to know what are the parts that I need to look up in order to fix this any input would be appreciate it thanks...