Seen quite a few posts on other forums about this, so a few years ago I did a bit of testing. Unscientifically of course.
I tried rape seed ,sunflower and veg oil straight into the oil tank.
on small 18” bars, it wouldn’t lube it correctly, heating up and smelling like a chippy. Started smoking after a while.
Tried it with milling too. Didnt end well.
What are your experiences?