[TorqueMan777]

None of the things you mentioned actually reduce the drivetrain losses. They only reduce drivetrain inertia. Which is good, you'll get a performance benefit from it. But to actually decrease drivetrain loss is much more difficult, and kind of tricky. You're looking for ways to decrease friction in the engine block between the rods, pistons, cylinder walls, transmission gears, rear end gears, etc. Aside from using different viscosity oils, you would have to be willing to rebuild the whole engine and drivetrain. Your drivetrain losses are pretty much set from the factory.