Green Grease Orginally was made by Slick 50. I had a tub that lased for years. It had PFTE in it. I could not find it now. But I bought a tube of Lucas Oil in green & white tube. It appears to be the same thing. Great stuff on M1icon / M1a. I did order a tube of Mobile syn aircraft grease red, that is good. But I would guess that Green Grease brand is the same also.