Originally Posted by punk666
When I was filling up the IDG oil on a CFM56, I was told to pierce three holes next to each other then one hole on the opposite side.
I was told this was to help the oil flow out of the can
Air flows a lot easier than oil, so you pour from 2-3 holes and have a single vent on t'other side. Speeds up the pour and helps stop "glugging" (technical term?)
Good gen on the shaking/piercing background, I agree it shouldn't be
necessary to skake modern oils after proper storage, though as the man says it won't do any harm either. And the point about flakes of chrome plate from screwdrivers rings true also. Again, I just couldn't see flakes coming from the cans themselves.