I know that in the US the fact that many AutoZones are no longer stocking GC has led to the perception that GC is being discontinued. My last couple of purchases of of GC have been date code M6 (2006) and on my last purchase I "cleaned out" my local Wal-Mart. I was back there today and the shelf was restocked so I bought another 8 litres (quarts) and I noticed that it was all M7 (2007) date code.
The supply of GC must be a regional situation--it's widely available at 3 or 4 major retailers in Canada, but perhaps for the US market most consumers are still leery of "0W" oils - at least 0W-30 - and erroneously think they are thin oils.
The supply of GC must be a regional situation--it's widely available at 3 or 4 major retailers in Canada, but perhaps for the US market most consumers are still leery of "0W" oils - at least 0W-30 - and erroneously think they are thin oils.