In Reply to: Oil, Conventional or Synthetic posted by Larry on December 12, 2017 at 06:44:47:
So what do you think would have happened had they conducted that demonstration at -50C or -30C instead of -40C? The -40C was carefully chosen because it is ten degrees above the pour point of the Amsoil product (-50C) and just below the typical pour point of the conventional product (a bit under -35C). So you get a dramatic marketing video where their product pours smoothly and the competitor is an unpumpable gel. Yes, synthetic engine oils have lower pour points and better viscosity properties than conventional oils but both of those oils meet all of the SAE 5W30 viscosity grade requirements - in particular pumping down to -35C and cold cranking performance down to -30C. That is all that is required and all that is guaranteed by that grade label. The AMSOIL video is the sort of theatrical marketing hype that makes me want to scream.
Education is a good thing so keep reading ;-) I'd suggest having a look at the SAE J300 requirements table. When you understand it and how engine oil viscosities are graded you will be well ahead of the vast majority of automobile owners.
SAE J300 Requirements Table