1) Every time I shoot. I view a gun as a tool that has the potential to save my life, so why not ensure it's in its best working order by taking the time to clean it?
3) Mobil 1 Synthetic. What's an engine? Hot, moving metal. What's a gun? Hot, moving metal. The Mobil works great and is a hell of a lot cheaper than true gun oil. You buy a quart for $5.00 or so and it last forever.