been using 3-in-1 for years, heck I'm sure my parents have been using it long before I was born and for good reason, it just is so handy to have. I use mine in a little oil can with flexi-spot, just a squirt here and there and no more door squeaks, axle whine, keeps sliding metal running smoothly, everything you expect a good oil to. The added PTFE I honestly can't say if it really makes a meaningful difference over original blend or not for my use, but doesn't hurt it either, maybe the hinges will take an extra 6 months to start squeaking again or a year, but not sure, not like I keep a track of it hah, just know it is useful to have around.
Rating: [5 of 5 Stars!]