grease, depending on one's definition, will typically "stay put", vs. oil which "runs". while both have pros and cons, . . .
Interesting read, relative to this topic by a pretty well known gun shop.
Proper Lubrication of Your Auto Pistol and Revolver
I had the same experience with the Tetra, I could feel the difference even after I tried to wipe it all off.. IMHO if it's a carry gun it doesn't get cold so type of lube isn't a issue and the grease is less likely to run somewhere you don't want it. If I left it out in freezing weather I would use tetra lube oil.I use a light dab of Tetra on my 1911s, and while it does get a little dirty, its never gummed up the works. I used to use automotive grease (lucas red and tacky) but gave TetraGun a try, and could feel a noticeable difference in how the slide racks and the gun functions. If its a polymer pistol I use CLP.
As a general rule, yes. Under extreme pressure and tight fit machine rails use a thin film of oil. Rails with less pressure and looser fit use grease. Very high RPM bearings use an air/oil mist or a very thick grease like Exxon Andok that will not spin out. Standard RPM bearings use oil or grease depensing on location.I'm no ME, but isn't there a rule that you oil spinning parts and grease sliding parts?