3 In One oil with PTFE.
I've used 3-in-one oil for years, and this is a real level up from the ordinary kind for firearms.
1) It is a thinner, runnier product. It will get to places with the spout that are not ordinarily reachable.
2) It is highly refined. It is nearly clear.
3) Doesn't react with the plastics found in firearms.
4) Temperature range is well within anything you'd expect with firearms.
5) It is extremely hydrophobic. Water will bead up on metal with the thinnest film of this stuff.
6) High film strength and takes extreme pressures due to the teflon.
7) Claims to be long lasting and it seems to last pretty long compared to any other thinnish oil. After a while most of the oil evaporates eventually, a very thin teflon film remains. It probably possesses moderately good long-term corrosion prevention characteristics.
8) Extremely good friction reducer. One of the slipperiest lubricants I've experienced.
9) It's $3 a bottle at Lowes, and the bottle is enough for years and years as so little of it is needed.
Bad:
1) Low odor but it has an odor.
2) Teflon has an annoying characteristic of getting on hands and wood and places you don't want it to. So does silicone.
3) Once it's on something you need to use a solvent to get it off...though it never seems to come off completely unless a some pretty drastic measures are taken.
4) It is not a food grade product and has some presumable amount of toxicity, though the bottle carries no warnings.