Hardest Spec to Meet?

when a lubricant manufacture tests their oil to and above specs by how much of a margin of SP,gf-6 dexo-3 ,MB 229.5 etc,,but not published to the common public,the brief specs they make available is only so much of proof,as the consistancy of the product is dictated by cost of license and field testing the specific oil to a end standard of unknown price
 
The toughest one is unquestionably the sniff test.

If you were around back in the GC days, you know it smelled like Gummy Bears. That's the gold standard, right there. Fight me if you think I'm wrong.
Redline and 300V both smell sweet
 
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