All the bottles have the red plugs in the bottles except the 10% green cool power and were in the cardboard shipping box. One bottle was cloudy and had oil separate out and was ballooned so did'nt take that one. I've been out of the hobby for 20 years and have never heard of the Large Super T or Super T. Have read on here that they are very likely OK if sealed and not exposed to sunlight. I'm not into very large engines or airplanes so if those can be used I'm guessing adding some Caster oil from my reading. I still have a gallon of Powermaster from 20 years ago as well. No idea as to the age but they do appear good.