If you believe that shit your a moron. The BEST oil test is simple Take a piece of plate. Pour small puddles on it in seperate areas'. Use a propane torch under each puddle. Time it from when you put the heat on the bottom of the plate to when the oil starts running from the heat. Which ever one takes the heat longest is the better oil for heat.

No, oils are not the same. I've proven that in my dirtbikes.

Besides that, I only run Royal Purple in my car, and nothing else. Brought up gas mileage, and my motor is always clean looking inside.