I get the the speed limit, fast- and then go 4-9 over it. I often first, second, sixth. I don't redline it, but I often shift past 5k.
In turns, I FLY. Not unsafely, but I really move in turns.
I get 450-550 a tank, but I also pay close attention to the road. Driving isn't going somewhere...its a race with a speed limit, and a time limit. I follow all the laws, but I always aim for the apex. If I am coming to a red light, I do not accelerate, I will coast or even EOC. It's funny when I pull out onto the main road, test my zero to sixty time (it's a 55) and then coast it out- there are other cars, then it goes to 50, then 35. I use fuel to have calculated fun, and then I move as fast as I can as efficiently as I can.
Lol, the other day, I was cruising at 60 in a 55, and a LS v6 was at a light that got stopped. I EOCed from 60 to 45, its a 45 mph zone, and bump started right at the light when it turned green- my rolling light start was 45 mph lol.
I have had two issues so far. Suspension is a bit squeaky in the rear on certain bumps, and my synchros on 5th and 6th grind if the shifter is too far left. I push the suspension hard to maintain speed, but its a Mustang. The gearbox is Fords fault.