I talked a bike mech. he said motor oil is the worst thing you can use because it attracts everything dirt hair. Said it will ruin a chain in no time flat.
That's why you only apply 1 drop on each bushing, and wipe the chain down afterwards. The oil is in the chain where it needs to be, and not on the sides collecting dirt. A lot of people here swear by motor oil/motor oil concoctions.
Yay, 3 pages.