What MPG is your dump truck getting?

Discussion in 'Trucks and Trailers' started by TriCityLawnCareLLC, Nov 23, 2013.

  1. TriCityLawnCareLLC

    TriCityLawnCareLLC LawnSite Bronze Member
    from Ohio
    Messages: 1,025

    Somewhat recently bought out first dump truck. Chevy k3500 flatbed dump with 99k miles. She'd been very much used by previous owner.she has the 5.7 350 gas engine. We've replaced:
    Spark plugs
    Air filter
    Tie rid ends
    Stabilizer link
    Wheel hub assembly
    Ball joint
    Universal joints in front drive shaft
    Oil pan and seal
    Idler arm

    She need a new fuel pump in rear tank but main tank works fine other than bad sending unit(gas gauge doesn't work). We will be putting all new fuel lines and filters on shortly plus all new brake lines and brakes. After everything I will put new tires and and have her aligned.

    Currently only getting 5.7 mpg with the attached leaf loader and pulling mowers. I'm inly getting around 6 without a trailer. I'm hoping once she has new tires and an alignment it will improve- I hope...

    Does this sound normal range for gas consumption on this size truck with the given engine type? Pics of the truck can be seen in my link in my signature.

    What type of fuel mileage are you getting in your gas engine dumps?
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  2. jsslawncare

    jsslawncare LawnSite Bronze Member
    Messages: 1,673

    Yes it normal. It's a work truck, 3/4 ton and up all get bad mileage. They have a lower gear in the rear end designed for work. I run a 1977 F350 with a 10' dump and mines about 8mpg.
  3. GQLL

    GQLL LawnSite Senior Member
    Messages: 846

    That's about average for a older gas dump. We average anywhere from 10-12 in ours depending on what they are hauling.
  4. Kelly's Landscaping

    Kelly's Landscaping LawnSite Platinum Member
    Messages: 4,725

    Loaded our 2wd ram 4500 gets 10-11 I can see 15-17 when I'm just driving her. Our 4wd ram 4500 gets 3-4 mpg less in each category. Won't make that mistake again in fact when I do replace them with new ones not only will they be 2wd but also I will change the gears which are now mid options of 444s and go with 410s. I haul stuff but nothing that requires the low efficiency gear sets. My trucks don't even know when they have a trailer its nothing to them.
  5. Vecchio Lawn Care

    Vecchio Lawn Care LawnSite Senior Member
    Messages: 905

    My dads f350 diesel gets 15-17. With a dump insert and single cab 4x4
  6. TriCityLawnCareLLC

    TriCityLawnCareLLC LawnSite Bronze Member
    from Ohio
    Messages: 1,025

    If I can get up to the 8-9 range I'd be satisfied. I'm very uncomfortable with the current 5.5-6 mpg range
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  7. Middle Tennessee Lawn

    Middle Tennessee Lawn LawnSite Member
    Messages: 220

    I have 2010 chevy 3500 series dump with auto trans. It gets 10-12 with air running but had a ford previously with international diesel it would get 14 or more even with air on.
    Our sterling tri axle dumps are 2010 models they get 6 loaded and 8 empty
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  8. whiffyspark

    whiffyspark LawnSite Fanatic
    Messages: 6,560

    Is two miles a gallon seriously that big of a deal to you?

    You guys crack me up with this gas mileage crap. Its a work truck put gas in it when it needs it nothing you can do about it
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  9. JCLawn and more

    JCLawn and more LawnSite Fanatic
    from MI
    Messages: 5,281

    It is kinda funny when dump trucks don't get that many miles on them. I drive 600-800 miles a week in the summer with my main towing truck and that is a bit different. I get 9.5 mpg with my 1993 1ton 6.5 diesel towing 8k in fairly good sized hills. Friend of mine did the same route with his 1986 454 dulley pulling one of my trucks home. He had 14k on and averaged about 3mpg. I would of been about 8 or 9. My half ton dodge with a 318 gets 9-10 mpg towing 4-6 on flat ground. If I get on the freeway it gets worse.
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  10. meador56

    meador56 LawnSite Member
    Messages: 90

    Eighteen months ago I found a F700 that went through the Nashville flood. I gave $5200 and spent about $1000 to dewater and dress it up it has a 429 5&2 w/a 31000 gvw cold air looks as new as a 95 model can. Has a 14 ft dump gets 5.5 unless you drive it over 60. Last winter bought 95 T300 KW for $4800 and shortened it in my shop and mounted a used 18 ft flat dump and it gets 6-8 depending on what it does. It is powered by 8.3 Cummins whit a 6 spd Fuller. Still have the 14ft gooseneck dump we used to think was better than good. medium duty trucks can be had reasonably and are cheaper to run than pickups and trailers.

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