Removed and Cleaned the MAF today, car runs properly so far, but since the issue was intermittent to begin with, I'll have to give it a couple of days to be sure.

In the Process of trying to find the MAF, I made a few observations which could explain the issue.

1. There is a lot of oil in the air intake system, in virtually every hose, in the airbox, all over the MAF. The source of this oil seems to be the small hose leading to the airbox, which later connects to the top of the dip stick tube.

2. The oil has destroyed one corner of the airfilter and a small amount of unflitered air has probably been getting in.

3. The engine oil is way overfilled, by what looks like a Hyundai dealer based on the sticker.