Gear ratio over drive or direct for heavy haul up to 110K?

I do get what you are saying yes the truck needs to be able to do the job but what alot of people dont under stand is when you are in an operation where you are only getting around 5 mpg if you could improve that to 6 mpg that's like 12 000 $ per year in your pocket unlike if you were pulling a van going from 8 mpg to 9 that may only be 3500$ a year in savings so the worse fuel economy you get its even more I important to improve. I'm only over 100 000 pounds once in 3 months most of the time I'm around 90-95 the 264 gears with a direct drive will have almost the exact same pulling power as a 355 with a double ove maybe more because you are not loosing 30-40hp in the transmission overdrives are very inefficient.I found out that a direct drive trans has a 14.98 to 1 first gear so startability should be ok the same trans in a single over has a 11.10 first. I was just trying to get any feedback see if anyone else is running this combo over 80 000 pounds gross. Fuel is our biggest expense yes our loads pay very well and you can make great money even with a 5 mpg truck but I like to boost my bottom line as much as possible. If I could spec this truck to get 6.5 mpg for my opinion I would save almost 20 000 per year on fuel that would cover over half the payment makes good business sense to me

 

I ran just over 100 000 last year