Subject says it all...my local Meijers is running sales on all of the Castrol products, and they have the price on the Blend 15W40 all the way down to $1/Qt! I had never even noticed it before, and the bottle doesn't give much info as to ratings...I think it was SL and CH-4, but it didn't list manufactuer's standards like most Delo, Delvac, etc. Searching here doesn't really give any info on it either, at least that I could find. Anyone use this stuff? Is it as good as LongLife/Delvac/Delo? Since it is cheaper than even the SuperTech 15W40, it seems like it might be a good deal?