Hints on better MPG on F-350 w/460??

Discussion in 'Trucks and Trailers' started by fivestarlawnken, Aug 1, 2007.

  1. fivestarlawnken

    fivestarlawnken LawnSite Senior Member
    Posts: 438

    Hey need a little help!! I have a 94 f-350 dually pulling approx 4500 pounds for my mowing rig. I just bought this truck it has 108,000 miles and every thing works well.No smoke etc. My problem is I think i'm getting maybe 6 mpg. What can i do to bump up the mpg to at least 9-10 mpg?????????????:confused: Thanks guys!!!
     
  2. grassmanak

    grassmanak LawnSite Senior Member
    Posts: 792

    check you air filters, tire pressure, what engine? dont run the a/c. lose some weight
     
  3. fivestarlawnken

    fivestarlawnken LawnSite Senior Member
    Posts: 438

    :drinkup: :drinkup: only weight i can get rid of is the driver and the beer cans when they fly out or get recycled!!!!!
     
  4. ksss

    ksss LawnSite Fanatic
    Posts: 7,128

    You may try a free flowing exhaust, KN type air filter, Platinum spark plugs, synthetic oil in diffs, tranny and engine, you may also see if you can get a programmer that may help. Running max. air in the tires will help.
     
  5. Gravel Rat

    Gravel Rat LawnSite Fanatic
    Posts: 9,544

    A 460 is piggy on fuel nothing you can do about it. 6-8 mpg is about the best you are going to get and it will get that loaded or empty.

    Give the truck a tune up and run some injector kleener through the fuel.

    The 460 works on torque not rpm and horsepower. Always keep the rpms low as the 460 works the best.
     
  6. Travel'n Trees

    Travel'n Trees LawnSite Senior Member
    Posts: 631

    check your intake hoses if they colapse under power. msd ignition, exhaust, headers, Kn, hypertech chip, electric fans, 160 degree thermostat with chip, clean up air box, force air into box, dryer duct. We saw 14 mpg. check air pressure, and keep her lubed up, I have had problems on synthetic fluids. delete smog pump, port and polish throttle body, underdrive pullies
     
  7. Gravel Rat

    Gravel Rat LawnSite Fanatic
    Posts: 9,544

    The one thing to keep in mind is don't spend more money trying to improve the mileage if you will never recoup the money spent in fuel savings.

    A 460 is a 460 a big block that loves gas. It might be even worth it to pop out the injectors and replace them with new or rebuilt ones. New squirters give a better fuel spray.

    Think you have a egg under the throttle pedal that you are trying not to break.
     
  8. Travel'n Trees

    Travel'n Trees LawnSite Senior Member
    Posts: 631

    most of these mods are cheap or you can use used product with little if any problems, except for thermostat. I was just playing around with my dads dump truck to see what I could do with little or no money.dont forget plugs and fuel filter,under a $1000 easy, so around 6000 miles with only a 4 mpg it would pay for itself.
     
  9. fivestarlawnken

    fivestarlawnken LawnSite Senior Member
    Posts: 438

    Thanks guys trust me were not breaking any pit road speed limits in ths truck!!!!!!!!!The plug wires look new,so I will check the plugs soon.I've heard the K&N filter will help.
     
  10. IA_James

    IA_James LawnSite Silver Member
    from Iowa
    Posts: 2,593

    Best way to get more than 6 mpg out of a 460 is to put it on a trailer. I had one of those in a 2wd 3/4 ton and only got about 10, with no load.
     

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