2005
378
Flattop
340" wheelbase
Frame mounted knuckle boom
Pulls utility poles with 2014 transcraft eagle 2 flatbed.
CAT C-13 ACERT Twin Turbo
7.5 mpg
I drive about 62 mph
Always shift up @ 1,500 rpm and down @ 900
Seems like I use more fuel at idle than I do when driving
379 mpg
Discussion in 'Peterbilt Forum' started by sharpshooter, Oct 31, 2010.
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Just lowered idle to 600 rpm was 725 think i will do better lets see what happens
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When I first got my truck with a cat motor I idled it like I did my Detroit 60 motor. Even tho my pals warned me not to. Big mistake. I would idle at around 600rpm and use tooons of fuel to idle. I now idle at 850-900 rpm and barely use any fuel. The logic makes no sense to me but I'm not a rocket surgeon so I just let it go.
If this has nothing to do with your comment, please ignore lol -
Haven't checked fuel miles since i turned it down
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When I have it sitting I trottle it up to 900 rpm
KB3MMX Thanks this. -
The guy with the rebuild I pull a 13.6 high box so I have alot of drag in the wind
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1997 379
550 Cat 13 spd 3.70 gear, 24.5
pulls dropdeck trailer.
It's consistently between 6.5 and 7.2 depending what is on the trailer
I rarely idle it and never go above 60 mph unless coasting on downhill.midcon Thanks this. -
Looking to buy a 389 2017 dose iny one no what mpg would be with a 53 foot dry van
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My 2016 with isx 500/1850 and reefer and usually 75-80k at 62-65 max gets about 5.5 out west and in the 6 neighborhood for midwest/east
Edit to add
If weight is lighter those numbers easily climb .5 to 1.0 mpg
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