[bartsau]

Got the T5 with a set of 3.9's and as good as they are I am thinking of going and trying some 3.7's. Find it sits on approx 2450 at 100km/hr.

1st is useable but very short I would prefer not quite so short. Having said that it is very forgiveable when launching at the drags with this setup. Doesn't ever really 'bog' down much at all.

As for fuel honestly not too big a difference at highway speeds. And the rest of the time it purely depends on how you drive it. I can be in 5th at 45km/hr if I want...