Kenworths and Mileage

Discussion in 'Trucks [ Eighteen Wheelers ]' started by dobb673, Oct 6, 2009.

  1. dobb673

    dobb673 Bobtail Member

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    Greetings all, I'm new to this site. I been driving since the 80s, and have owned a couple of 90s Peterbilts for some time now. I am going to retire/replace one. I've been looking at KWs. Wanted to ask your advice on fuel mileage (BTW I haul various machinery within a 500 mile radius or so in the southeast, having a wide range of weights):

    All other things equal, will a T600 get that much better mileage than a W900L because of the aerodynamics (or any other reasons)?

    One W900L I'm looking at has a Cat C16 600hp. That's probably a guzzler, right? Can it be turned down?

    What about a T2000 or Pete 387? Where do they fit into the mileage picture?

    I've tried to read all I could find here about opinions on engine makes. I have Cats in my Petes and they have really been reliable. From everything I've read, you all seem to indicate that Cats are the most reliable but the worst on fuel. Have I generally read that correct?

    Thanks a million!
     
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  3. broncrider

    broncrider Road Train Member

    not always.....my T6 with kitty power gets 6.5 and up to 8.15

    but im not hualing alot of OD machinery either
    from the sounds of it, an areo truck wont help much unless your empty.....OD will screw the mileage up no matter how areo the tractor is

    also the t2000/387 have problems with the doors staying sealed

    the c16 should get about the same mileage as a c15.....its all managed by your right foot....me , myself would go for the c16, just for the available power, then again i dont know what all you hual
     
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  4. 25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

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    If the loads aren't aerodynamic, it would make less difference if the tractor was.

    The 600 Cat is a good motor from what I have heard, I wouldn't be worried about it using more fuel than a turned back one, it's the torque and horsepower actually used that burns the fuel, you wouldn't need to push that 1 much.

    Turning engines back from design doesn't usually help mileage; it tends to turn most engines into poor performers in my experience.
     
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  5. Jfaulk99

    Jfaulk99 Road Train Member

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    The driver has WAY more to do with fuel mileage than the shape of the truck ever could, all things being equal the T600 would probably do better on paper. In real life there's too many variables to say for sure you'd see any benefit. Also lower HP doesn't mean better fuel economy, if it did we'd all be driving 350hp Driptroits.:biggrin_25523:
     
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  6. dobb673

    dobb673 Bobtail Member

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    Here goes the dumb question of the century: What does "OD" mean? If you mean oversize/overweight, I haven't ever had to do that.

    My typical scenario is hauling a heavy dozer one day, then a couple of light bobcats the next. I have to pull different trailers, sometimes a lowboy, sometimes a flat, sometimes even a van.

    So you guys are saying aerodynamics mean most for vans and less for flats/lowboys?

    Thanks again!
     
  7. outerspacehillbilly

    outerspacehillbilly "Instigator of the Legend"

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    "OD" is Over dimensional. Yes the areo is more towards vans than flats/lowboys because with the flat/low you'll have more drag and resistance that can be picked up by whatever you'll be hauling. It could help some but very little in most instances. In your case the T-600 and W-900 are both nice trucks. Personally I'd go with the W900 though.
     
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  8. 2hellandback

    2hellandback Heavy Load Member

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    Hey Kevin you know about my 600s milage. And personaly ithink the cummins to be just as reliable if not more so, and ive driven lots of cats. if ididnt have to pay for stuff id go cat but since i do pay i choose cummins in a t-600 vs the 900

    Oh and if your paid by weight t-600 over the 900 hands down.
     
    Last edited: Oct 8, 2009
  9. broncrider

    broncrider Road Train Member

    pulling a flat with bobcats you would get good mileage in a t6, same with a van

    no matter what truck pullin a "heavy dozer" is gonna kill mileage, SD's dont do so great either from what i hear
     
  10. Tank33

    Tank33 Medium Load Member

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    As it's been said, pulling machinery, that W900L won't do much worse than the T600.

    You will have a much easier time hiring IMO if you have a W900L, than a T600. Also, when resale time comes, you can ALWAYS sell a 379 Pete, or a W900 Kenworth, no matter the miles, they seem to always sell.

    Power DOES equal fuel economy...IF it's driven right. I have seen many cases of high HP big displacement engines beating out smaller engines in fuel economy, all how it's driven and maintained.
     
  11. 2hellandback

    2hellandback Heavy Load Member

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