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over the road trucks yes easy to do. at lower speeds i see 12 to 15 mpg as a very real number.
closer to 9 or 11 mpg for 75 mph
but for trucks that are on and off road.
like log trucks and 105,500lb chip trucks. that must have ground clearance and or aggressive tires.
do to being driven on rock roads, mountainous areas, foul weather.
and all ways rushing for that last load of the day, quite often drivers are pad by the load not the mile.
so driving slow is throne out the window. for them to make an extra $100ish or so a day for that one extra load, and a lower chance of losing there job be cause they avreg more loads per day.
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1 86 T\D trooper with rare GEN 3 rods TRANS FIXED  NOW DD
1 86 4WD 5sp pup is 2.3L gas, but plan on 2.2L diesel repower
1 91 trop, long term plan is a group buy of imported Isuzu 4JB1-T 2.8L I-4 engines, hoping to get price down to 2K not 3K plus
1993 sidekick my MPG toy, epa rating 26.
i get 29/31 with stock drive train.
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