Changed my oil today but like a fool overfilled when topping up, I did not notice this at first as I have a strange dipstick and fresh oil is pretty difficult to spot however I overfilled by around 5cm over the max point. Without noticing I drove the vehicle to work (30 mile drive).
I plan to drain the oil to the appropriate level however I am a little worried about oil foaming. My heart says that it's fine but my brain wants to ask you good people for advice.
Is there any way I can determine if oil foaming happened or is happening e.g. bubbles on dipstick?
I also have some other questions post to the previous question, does oil foaming damage the properties of the oil if it were to foam.
Should I drain my oil and start again?
I am probably being a bit of a hypochondriac but never hurts to get advice rather than remaining ignorant.
The car is a 2007 ford fiesta style with a duratec 1.25cc engine.