James Yeager the controversial Youtuber who lost his TN concealed license(which has since be re-instated as of 04/2013) has a interesting clip online of how to oil/use gun care products on a standard Glock pistol.
JY uses what he calls the 3-2-1 method. He displays a model 19 then adds 3-2-1 drops or dabs of GunButter.
It was informative. The take-away from Yeager & other trained Glock armorers/LE dept gunsmiths is NOT to use excessive amounts of grease/CLP/gun oil/etc.
ClydeFrog