06 Cobalt Oil Leak
I have had two oil leaks in the past 3 months, both of them resulting from cracked O-rings in the oil filter cap, i know the oil is not overfilled because i have done my last two oil changes and have ensured all oil is drained out before I refill with the manufacturers reccomended amount. However the oil change done before these two was done at an auto shop, and when i did my first oil change I noticed that they overfilled the oil by about a quart, i'm not sure if this caused any damage. Also both times the O-rings cracked its been below freezing and snowing with high winds. Anyone got any advice to why they keep breaking???