Quick question. Due an engine oil change and about to do it and there is two bolts in the oil container (not sure of ts proper name) that could be used to let out the oil. I cant remember which one i used before.
One bolt has an allen key head and the other is a normal hex head. Both bolts are at the same level with the allen key bolt on the side of the oil container while the other is on the back end facing the exhaust.
Will it matter which one i open? Both look about the same size.

