Gentlemen - Today I changed my oil in my '99 Accord with the 2.3 litre engine using '02 and '04 vintage GC green. Holy snikes! Immediately, the engine ran a lot more smoothly and quietly. I then sent my wife for a drive in the car and she reported the same. Now here's the good part: My wife actually told me to get more GC! Yes, I actually have permission to increase my oil stash! So, I'm trading in all my old oil stash for GC. Unfortuately, there's no more green left around my parts - only gold. Oh well. Thank you for making my car happy and saving my marriage.