The obvious #1 problem you hear about is failure to feed with auto pistols. I submit that a large percentage of ftf problems would be solved simply by cleaning said pistols and using a light wt lubricant on major moving parts. Try it sometime. If you are having problems, oil that sucker up...If you do not have any oil pull out your cars dipstick a couple of times and drip some oil on the slide contact areas and the areas of the barrel that make contact on recoil and lockup. The used engine oil won't hurt a thing...clean it off when you get home. I know this is old hat to folks who have been doing this for a while. I think this explains why you read some post from shooters who hate a particular pistol that most have no problem with. They are machines and they need to be lubricated. For those old guys like me your gun will be in better shape with less wear when you hand it down to your children. If you have to much oil it will get dirty quicker and maybe a little more carbon buildup but you willl take care of it when you clean it anyway. My $.02 for new shooters.