If the oil is the Holy Spirit and they can run out of oil then it would be true that you can run out of Holy Spirit.
There isn't a verse to say we can run out of Holy Spirit once we are sealed by the Holy Spirit. Or that we can be unpurchased once purchased by the blood of Christ. Or that the gift of salvation by grace through faith can be rescinded. Or our adoption as sons and daughters can be turned into unadoption.
The oil must be something else.
Matthew 15:8-9
8This people draweth nigh unto me with their mouth, and honoureth me with
their lips; but their heart is far from me.
9But in vain they do worship me, teaching
for doctrines the commandments of men.
Meaning there is a big difference between lipservice and loving God. A big difference between head knowledge of the gospel and real saving faith. This is how we know Jesus.
If you've ever known Jesus through genuine love and sincere faith then you will not be among those to who He says "depart from me, I never knew you."
The oil is our sincere loving relationship to the flame who is God. If you love God then always love God and love Him with all you have. This is why this is the first and greatest commandment.
This is why the parable is about a wedding: a bride should love her husband.
As far as I can see this is the only logical conclusion to why Jesus said to the 5 foolish versions "depart from Me. I never knew you."