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If you aren't seeing any leaks, or smoke I woudl probably suspect a stuck open PCV valve. When it hangs in the open position it can burn just a litle bit of oil the whole time the engine is running. 95% of the time you won't even see ant smoke at all because it burns so little and because it sucks the oil in through the intake where it is almost completely burned up in the combustion chamber.
You might remove the intake ducting from the throttle body and look for signs of carbon build up and oil residue- that would tell you if the PCV is hanging open.
If you end up swapping the PCV out, here is where it's located:
Your only other options for oil consumption other than leaks would be worn valve guides (it would smoke on startup and then go away after a few seconds), or worn rings (a little bit of smoke all the time).
Please let me know if you need additional info.
Please don't forget to rate.
Please let me know if you need additional info. Don't forget to rate.