I can only speek for myself having the T56 6 speed.
The 6 gear is great, although at 260k it was just about time to change from 5th - 6th so i never got a chance to see how it cruised.
Where it has its very big advantages as i see it.
6th, 110k, 1400rpm, Melbourne to Mt Gambier 420km 1 Tank 65lt.
Its all about fuel economy.
Not to mention i can actually start to hear the radio as it cruises nice with not much noise for a change, helps also when passing those guys with the blue lights on the top, nice and quiet...
