i got a 2008 kenworth t660 455 cummins isx 10 spd 3.36 ratio hauling reefer from cali to florida on i-10 weight 70k-75k speed 73-75 mpg 5 miles per gallon i know i could get better mpg by reducing my speed but is this normal if not how can i fix this. I've seen t660's do 6.5 miles a gallon easy
kenworth t660 mpg problem
Discussion in 'Trucks [ Eighteen Wheelers ]' started by kw08t660, Dec 8, 2013.