Has anybody tried using low viscosity or synthetic gear oil in their transmissions and differentials...which should theoretically reduce drivetrain friction? I know that using synthetic engine oil is known to improve mileage...just wondering if anybody has seen the same results by improving the lubrication in their drivetrains?
And if you go that far, you might as well use synthetic grease in CV/U joints and wheel bearings.
Heres an article I found after a few minutes surfing google:
http://www.machinerylubrication.com/...?articleid=167