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Originally Posted by Gasoline Fumes
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There have been some SAE Papers dedicated to tribology and mpg effects attributed to various lubes.
The message was that while differential lube WAS important,the drag associated with the wheel bearings was essentially meaningless.
NASCAR teams are running micro-finished gears in their powertrains which allows lower viscosity oils without asperity and spin-welding hazards.They get a 1% hydrodynamic drag reduction for a hundred thousand dollars.
I don't know that I'd gamble a gear train on an unknown quantity.The manufacturer is cowardly for not providing full laboratory test results comparing their product to a premium wheel bearing grease.