Just to make sure we are comparing apples to apples, I read on page 1:
Vehicle tests show that the consumption of fuel oil for vehicles using research and development engine oil will drop by 12%, and noise will drop by an average of 7dB.
Now what is "research and development engine oil"? Is this a special lube they came up with for the purpose? I know they talked of getting the best selling 20 & 30 grade oils for use in their testing later on in the paper. But what type of oil did this--the best selling 20 grade, or something one of them concocted?
EDIT: OK I see this R&D oil is what they call their "debugging oil." that is what did better on their test. What exactly is that?
For the record, I don't doubt that an oil that reduces friction to the point of a 12% increase in fuel consumption will be quieter. I was just wondering what is being compared to what, that's all.