Brick MPG vs Aerodynamic design

the fuel will be about the same about 1 or 2 mpg i do believe maybe 3 at the most. b/c you are going still spend about $800 to $1000 a per fill up depending how much you drive it, if you don't drive it that much i would keep it about 1/2 tank in each tank and thats all

 

Far as trucking goes 0.5 Mph is a big difference..

Ran the so called bricks and it was very hard to get into the 6Mpg range..
Usually around 5.5-5.9 ar Brick said.. Best I could get on a so called light load at 65Mph would be 6.2-6.5 at max... (probaly would say average between 5.6-5.7Mph)

A T600 and a Columbia I would get 5.5-6.5 and sometimes in the 7+MPh (7.2 max)

Above is with a Detroit


Now something else that plays a big part is engine gears ext...
Run a Cat and your just not going to get the upper 6 and most lily never see 7Mph

But a Cat in my opinion will use less fuel then a Detroit pulling heavy loads in mountains (that has been my experience) on the flats Detroit will use less..


But one of the most important factors when calculating fuel is driving style.. Some people just care about it and take steps in saving fuel. Other just smash the peddle and go all the time.. Many ways to save fuel in just how you drive...

Above is just my experience and something that I did pay a lot of attention to.. Just something I did to keep my self occupied on the road..

Something I could

 

brickman; that truck is saaweet! time to polish those tanks, i see some dirt building up

 

what kinda weight is those car haulers loaded at? seams like they can be pretty heavy

what RPMs are you turning at 75mph?