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May 25, 2005
"If you can find the 2004 and older GC 0w-30 it is the best." A fine and well mannered analyst told me this. Now, how do I find it? What does it look like? What numbers or codes should I be looking for? Do the Made in Germany words on the back of the bottle signify that it is the 2004 GC or not? Red label on back and front? Green tint to the oil or amber? Sweet smelling or semi-sweet or putrid? Is there anything that I am forgetting?
All I can say...

Grab that 0w-30 castrol syntec bottle (yes the one with the red markings and lettering) and look at the back. It should say something like "made in Germany" near the UPC bar code. This has nothing to do with identifying the dating of the blend as far as I know.

Now flip the bottle upside down and there should be a printing in white letters, for whose first digits will read the "born on" date. I don't have a bottle with me now, but I seem to recall a letter followed by two digits denoting the year. Another thread spoke of how to make further sense of it, and could probably be found in a GC section search with something like "date".

As far as color, yes the '04 blend is green and from what others have said is sweet smelling...something like "gum bears". It appears that the '05 blend has changed to gold and lost the sweet smell, but I noticed someone recently made a comment that on a more recent '05 date, that the color switched back to green.

Well, color is color. But honestly, it's the rest of the add pack and base oil that needs to handle the task of protecting the engine and giving proof by a good UOA any other lubricant in the business.

Will the newer stuff put the older stuff to shame, or will we not see the likes of the '04 batch again here in the states for some time? Perhaps a marketting catch... Just have to wait and see as the miles collect and UOA's are compaired.

Thanks BlazerLT.

From THIS thread.

For the Date codes, They begin with M0********.
GC with codes of M02**, M03**, M04**, and M0501** are green, M0502 up are the amber, thought there are reports of M0504** being green again.

[ May 28, 2005, 11:04 AM: Message edited by: blupupher ]
ThanX Guys,

Got busy driving over the weekend and scored. M03... and M04... only. I wont need oil for quite some time. I'll try to get a picture up soon. :happy:
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