I just checked and didn't see anything else on this so I thought I would mention it. I was at a Walmart last week and saw Supertech synthetic in a new clear bottle and it said it now meets GM's 4718 spec. They also had a few grades of the conventional in the new angular shaped bottles that everyone is saying are only SL rated but these were clearly SM marked. There was one lonely bottle of the old M1 tri-synthetic formula (SJ I think----did one of you return this? ) and guess what... the bottle shape matches the new Supertech bottles. I know, it doesn't mean anything but I love conspiracy theories.