yesterday, for the 1st time in my local walmart, I saw Pennzoil syn/blend 15w/40 oil($2.39 per qt) ...and it is SJ rated, I wonder why...?? (even the pennz 20w/50 dino and LongLife 15/40 are SL rated.) the syn/blend 15/40 has a thickness of 16 cSt@100c, and pour point of -17F... is this good/regular/bad? has anyone used this oil in their cars? any additional info? 2nd: I just saw on Pennz. website about the Synthetic European Formula 5w/40 oil...is this oil availble at all in US? I've never seen it anywhere. sound good on paper: 14cSt@100c, and pp of -33F(-37c) Does anybody know how one can find this oil? thanks for comments/info/opinions etc.