I bought the only two bottles of GC in the Asheboro NC store. One was 03 and one was 04. Since that is three quarts shy of an oil change (in my 2005 Frontier), I thought I would never experience the magic of the green. Today I visited a store in a neighboring city and they have tons of the stuff! The first quart I checked was the 02 vintage and the next few were 03. I wasn't ready to buy, so I didn't pull them all down, but the top rack was full all the way to the back, hopefully with the proper "Made in Germany" brew. I would like to have enough for at least a couple of oil changes, thus my question: is 02 too old? What about 03?